In 2007, after the Great Hinamizawa Disaster, Akasaka and Oishi return to the ruined village, and reflect on the events that happened twenty-four years before.

The gang plays a game of "zombie tag" at school, and on the way home, Keiichi learns of Oyashiro-sama's curse and the mysterious Hinamizawa serial murders.

The gang goes to visit the festival site during the preparations and later participates in a baseball game. Meanwhile, Satoko worries about Rika's depression and tries to confront her about it.

During the Cotton Drifting Festival, the gang's club activities consist of eating contests and watching Rika's dance. After the festival, Satoko becomes convinced that she and Rika are being watched.

As mysterious men storm the Furude house, Satoko manages to hide, but Rika refuses to join her. When Satoko leaves her hiding place, she discovers many horrifying sights in the once peaceful village of Hinamizawa.

Rika begins a new world, but is getting tired of the same events repeating themselves. However, Keiichi proves to her that fate isn't always set in stone.

Influenced by Keiichi's encouragement and the fact that her friends are starting to avoid repeating their mistakes by remembering glimpses of the other worlds, Rika decides to begin the fight against her own fate.

Rika's plans are hindered by the appearance of Satoko's abusive uncle, Teppei, and she starts to lose her newfound faith. Keiichi and the rest of the gang decide to find a way to release Satoko from the clutches of her uncle.

The fight to save Satoko from her uncle continues as the gang tries to appeal to the Child Counseling Center, first alone, and then they gather the whole class. But will it be enough?

The gang's struggle to help Satoko forces them to confront the village elders, including the leader of the Sonozaki family as Satoko's resilience nears its limit.

The efforts to rescue Satoko reach a conclusion, and with the Cotton Drifting Festival the next day, everything seems to moving in the direction of a happy ending — until the true culprit finally comes forth.

Rika tells her friends the truth behind the mysterious Hinamizawa Syndrome. Meanwhile, the enemy continues with their plan, eliminating any opposition.

The enemy closes in on the Furude house, and the gang comes to Rika's aid. As they fight the attackers, they realize that if everyone stands together and believes, they can indeed fight fate. But, does everyone truly believe?

Takano's past is revealed, ranging from her stay in an abusive orphanage, to the beginning of her research into the Hinamizawa Syndrome.

Takano's story continues, including how she met her foster grandfather, and her determination to continue his work.

As Hanyu hopelessly watches the cruel events that occur during the dam incident, she and Rika eagerly await the arrival of the one person who will be the key in bringing an end to the enemy's intentions.

Rika offers herself as a test subject for Irie and Takano's research. More light is shed on the deaths of Satoko's and Rika's parents and their involvement with the legend of Oyashiro-sama's curse.

Details about Satoshi's past are revealed, including the reason for his disappearance. Rika and Hanyu make their final preparations for the impending struggle against destiny.

Hanyu is physically introduced into the world as a transfer student to the Hinamizawa school. After a brief meeting with Takano and Tomitake, she remembers the past worlds and informs Rika of the enemy's intentions.

Rika gathers her allies and starts to make plans, while obtaining more information about the enemy and those supporting their ambitions.

False information regarding Rika is spread by Oishi's group at the precinct, leaving the Yamainu in disarray, and racing to prevent their plans from being foiled.

Upon discovering that Tomitake has been captured, Irie rushes to escape and ends up meeting Shion and her bodyguard, Kasai, on their way to the Sonozaki Estate. Little do they know, they're being followed...

Irie, Kasai, and Shion head to the clinic to rescue Tomitake, and Irie finally reveals the truth about Satoshi's disappearance to Shion. Elsewhere, the gang battles the Yamainu in the mountains.

The Yamainu concede defeat, but Takano refuses to surrender. As she flees into the mountains, she has a final, emotional confrontation with Rika's group. At last, Rika and all of her friends are able to attend the Cotton Drifting Festival, finally free from fate.