A creative planner for an IT company picks up a man and a woman waiting by the side of the road in the rain one night. The man claims to be the woman's husband, and the woman leaves behind an inscribed locket in the car when they reach their hotel. However, when he tries to return the locket to her, he becomes involved in a complicated story of murder.
~~ Adapted from the novel "Kajitsu no Nai Mori" by Matsumoto Seichō.