The block calendar reads "Weekend, June 18, 1983."
At the Furude Shrine, Keiichi helps with the construction of stalls for the Watanagashi Festival. He takes a sip of a drink during a break and happily celebrates it. He then turns to see Rika practicing with a wooden hoe. He calls out to her and she responds happily. Two villagers express satisfaction with "Rika-chan" and her efforts. Returning to work, he is past by a silent Mion who then turns and slyly asks him if he is working hard. He notes that "Mion" is as well. As she walk away, he stares back at her but then smiles.
In the shade of a statue, Keiichi sits and declares himself tired out. A girl's hand offers him a drink, which he accepts thinking it is Mion only to see it is Shion. She happily announces herself as the thoughtful sister. Keiichi growls back that Standard Japanese for " bastard bitch," "asshole," and "a representative of the lower species of Otaku": 手前 (temae). She giggles indulgently at his frustration and reminds him that it was he who mixed them up. He mutters in frustration but cannot refuse a refreshing drink, which he gulps down, only to be shocked by Mion behind him screaming "SHION!" She is holding two drinks. As he coughs and sputters, Mion demands to know why she is hanging around him again. Shion condescendingly replies that, unlike Mion, she is being considerate of others. "Speaking of which," she asks why Mion is holding two cups of barley tea. This shakes up Mion who stammeringly tries to insist that she was really thirsty as she gulps down both cups. Shion continues tease her sister by observing how she looks gulping down the drinks. For her part, Mion declares she hates her. Shion laughs until the are interrupted by the sound of a camera.
The sound belongs of course to the camera of Tomitake Jirō who stands with Takano Miyo. He greets them, and Mion returns it. Takano specifically greets Shion, noting that she often come around. Jirō focuses on Keiichi and identifies him as the transfer student who he heard about. Keiichi asks him if they have met before. Jirō compliments him for remembering passing him on the road a few times, then he introduces himself as a photographer from Tōkyō. Takano then asks Keiichi if he knows her. Keiichi sheepishly confesses that he does not, and Mion explains to him that she works at the nearby clinic. She tells him to let her know when he come for his next appointment only to playfully add that she will prepare her biggest needles for him. Ōishi arrives, and Takano returns his greeting and asks if he is scoping out security for the following morning. He laughs and greets Jirō and remarks that he must love visiting Hinamizawa. As he bids them goodbye, Shion calls out to him while Mion glares at him. Shion says she would like this year's Watanagashi Festival to happen without an incident. Ōishi laughs and waves as he descends the temple steps and jokes that he now has his work cut out for him.
Mion continues to glare at his direction as Jirō asks if he is correct that Ōishi talked about Oyashiro-sama's Curse. Mion quickly takes Keiichi by the hand and tells him that she is hungry. As they start to leave, Takano muses that she wonders who will die and who will disappear this year. This causes Keiichi to stop and turn and ask her what she means as the higurashi c ry. Mion stares darkly ahead. After a pause, she flatly insists that it is a boring story. Shion darkly asks Mion if she has never told him the story. Mion keeps pulling on his hand, but Keiichi does not move and asks what they are talking about. After gripping his hand tightly, Mion lets it go. She announces that he better hurry or she will eat all of the snacks perpared for volunteers. He responds that he understands, which causes her to pause for a moment, then run off.
Keiichi stares after her for a moment until he is interrupted by Takano asking if he believes in curses. When he turns with a start, Jirō asks if he knows about the Hinamizawa Dam Project. When he responds that he does, Jirō explains that the villagers who opposed it set up their base at the shrine to Oyashiro-sama in the hope he would favor them. Jirō dismisses such as superstition until something happened. When Keiichi asks what this was, Shion interjects that the Construction Manager was murdered. This stuns Keiichi. With a grainy black and white flashback, Shion explains that his attackers used pickaxes, then dismembered him and disposed of his parts. Jirō continues that one of the attackers got away, and the victim's right arm remains missing. Takano then describes a couple who supported the project who fell from a cliff. While the man's body was found, his wife's remains missing. Mion takes up the flashback describing how the Shinto priest of the shrine who opposed the project died suddenly. His wife left a suicide note and disappeared. Jirō then adds that the wife of the younger brother of the deceased dam support was found beaten to death. Jirō deems it interesting that all of these events happened on the night of the Watanagashi Festival. Keiichi sweats as he listens to Takano muse that everyone who was involved with the dam project is dying off one by one, and this has sparked the belief in a curse.
Jirō asks Keiichi what he thinks. He gathers himself and tries to solemnly deny the existence of a curse. Shion laughs in relief as she claims she knew he would think rationally about it. Takano suggests that if it is neither a curse nor coincidence, it certainly makes one wonder what will happen next. Jirō explains that she believes a person or group is responsible, and the two go back and forth. As the scene focuses on Hinamizawa's official higurashi on a tree, Shion claims that they have evidence that the people of Hinamizawa are involved. Agitated, Keiichi denies this, but Shion insists that every year one person dies and another disappears. When Keiichi demands to know what that means, Takano describes the legend that in the past, the villagers offered up human sacrifices to Oyashiro-sama. Keiichi stammeringly repeats "Hu-human sacrifices?!" Takano explains with a giggle that the victim would be wrapped in a bamboo mat then thrown into the swamp. Keiichi asks if what she means when she says a person disappears is that the person is sacrificed to Oyashiro-sama. Shion insists that someone will be killed in the name of the curse, then another will be offered as a sacrifice. As the scene progressively focuses on the plaque that reads "Furude Shrine," a terrified Keiichi concludes that someone in Hinamizawa is responsible.

The scene shifts to the twilight sky, with the wind picking up to blow through the trees, and the higurashi increase their c ries.
Shion notes that the Watanagashi Festival is the next day. She laments that she does not want anyone to die or disappear. She pauses as the wind blows her hair. Keiichi can only repeat that it is "tomorrow." Takano helpfully muses who will die and who will disappear as the wind blows her hair. Keiichi stands with a stunned expression as the wind blows his hair.
The paper calendar reads, "Sunday, June 19, 1983."
At the festival, Rena begins to enter Cute Mode as she celebrates the effort made this year. Behind her stands Keiichi who appears nonplussed, while next to him, Mion has a smile. She replies to Rena that it is because everyone in Hinamizawa are there. Rena sees Satoko and Rika walking. Rika is wearing her miko clothes. Satoko excitedly and formally greets them while Rika blushes and bows. Rika's appearance sends Chibi Rena rapidly into Take Home Mode which generates a satisfied "Mii" from Rika. Mion adds her encouragement by noting that it is almost time for her dance. Rika blushes and confesses that she is a little nervous. Satoko tells her she will be great, and Keiichi promises to cheer her on from the audience. They all cheer together which causes Rika to happily smile.
Keiichi finds himself looking for everyone amongst the stalls. He takes a few steps then sees Rika walking with her ceremonial hoe. Keiichi complains that he cannot see anything with the crowd. Shion pats him on his left shoulder then tell him to follow her.
Some distance away, Keiichi finally realizes that they are walking away from the festival. When he complains to Shion, she hushes him and tells him to remain quiet and follow her. She peers over a bush and happily directs his attention. He looks and sees Jirō kneeling before the doors of the Saiguden with Takano right behind him watching what he is doing. They focus and see Jirō say something which causes Takano to smile in satisfaction. Keiichi grows irritated and asks Shion if she brought him there just to show him this. She affirms it, and he protests that he thought she was taking him to watch Rika's dance. Shion teases him about wanting to watch Rika dance so badly, then suggests that if that is what he is into she may have to reevaluate her opinion of him. Exasperated, Keiichi announces that he is leaving, only to have Takano call out to him.
He and Shion turn to see Jirō and Takano smiling as they peer down at them. Jirō compliments Keiichi for being smoother than he thought, "hooking up with your girlfriend," out there. Shion asks him if that is not what he and Takano are doing. Takano playfully replies that, unfortunately, they are not doing anything they would enjoy watching. When Shion asks them what they are doing, Jirō laughs as he sheepishly asks them not to tell anyone that they are breaking into the Saiguden. Keiichi quickly wonders why it is a secret and asks if they plan to steal something. Jirō assures him that they just want to see what is inside.
Takano playfully flips her hair then explains that the Saiguden is the "forbidden" storehouse for old ritual tools. Only members of the Furude Family and a select few may enter since outsiders would defile the sacred site. The scene focuses on the lock on the door as Keiichi protests that that sort of means they should not enter it. Takano walks towards it as she agrees but insists that the answer.png.pngs to all of her curious questions lie behind the door.
Jirō opens the lock, and Takano thanks him. She then turns her head back towards Keiichi and Shion and genially notes that they are their partners in crime now and asks them if they would like to come in an look with them. Keiichi stammers that they do not, but a blushing and excited Shion grabs his arm and says it sounds interesting. Keiichi protests that they are not suppose to go in since it is a sacred building. Shion replies that since she is part of the Sonozaki family, she has some idea what type of tools are in there. Her eyes narrow as she explains that she wants him to see them.
As the end titles music starts, Keiichi continues his protest, but Shion brings her face closer with a begging look. She insists, as the scene passes over the smiling Jirō and Takano, that if he enters and is bored then he can leave, but she thinks he will be quite fascinated by what is inside.
She then darkly asks him if he is afraid of the curse. Keiichi stammeringly insists that he is not afraid of any curse. Jirō takes a cigarette and announces that he will stay outside to keep watch and invites him to enter: "A young guy like you might find the stuff in there pretty fascinating." Keiichi thinks for a moment, then starts to walk as he agrees but promises he will leave if it is not interesting. Shion excitedly responds that is what she wanted to hear as she begins to walk.
"You've made your choice, then," Takano observes as she starts to open the door for them, "let's go." Keiichi and Shion walk towards the door as the scene fades into the end titles.