Twenty years on from the nightmare that visited the Morikawa family, a woman appears at a certain seaside town. She's been traveling around, gathering information about Yusuke Saito's story—and she's introducing herself as Yusuke's daughter. Now Sumire Okazaki has reached out to Akari Ichinose, telling her about a five-year gap in Yusuke's life that nobody knows about. But who really was the devil this whole time, and what was the crime committed?