In a village deeply rooted in the practice of twin worship, Yoshiomi is forced to bear the burden of a curse. He and his comatose twin brother, Miwa, have been compelled for years to participate in a religious ritual meant to invoke this curse. Their lives take a turn when a police officer named Norito manages to free both twins from the village of Hirasaka. As Norito and Yoshiomi grow increasingly close, a mysterious incident occurs that upends their fragile peace. Without warning, Miwa, who had been lying in a coma, suddenly vanishes without a trace. This disappearance forces Yoshiomi and Norito to work together, beginning a race against time to uncover the truth behind Miwa’s vanishing and the dark secrets of the twin worship ceremony.