Cure

Set in and around a bleak, decaying Tokyo, a series of murders have been committed by average, ordinary people who claim to have had no control over their horrifying actions. Following the only link a mysterious stranger who had brief contact with each perpetrator/victim/detective Kenichi Takabe (Koji Yakusho) places his own sanity on the line as he tries to end the wave of inexplicable terror. (official distributor synopsis)