A village divided by a river is a village hiding something. Hiroshi arrives as the outsider who sees what everyone else learned to stop asking about, and the show knows that curiosity in a place designed to punish it is its own kind of trap. The horror isn't jump scares or gore; it's the slow realization that the friendliest people in town are the ones most likely to drag you across that river. Twelve episodes to figure out if he belongs there or if belonging was always the point.
Hiroshi Kuzumi moves to Jogamachi, a mountain village frozen in time, expecting a quiet fresh start. Instead, he finds himself caught between two worlds: the modern half of town and the ancient, forbidden side across the river where locals refuse to tread. His classmates warm to him quickly, but the enigmatic class president Nemuru delivers a chilling message: stay out of old Jogamachi, or face the consequences. Curious and stubborn, Hiroshi ignores the warning. What unfolds is a descent into supernatural horror woven into the village's forgotten past. Strange rituals, cryptic disappearances, and shapeshifting entities blur the line between human and beast. As Hiroshi uncovers Jogamachi's dark secrets, he realizes the village's traditions exist for a reason, and breaking them comes at a terrible cost. Part mystery box, part folk horror, this series asks whether some knowledge is meant to stay buried, and whether friendship can survive when the truth demands a sacrifice.