Deranged is a Korean movie about a biological condition. It is a mystery thriller that begins by bringing chaos and hysteria throughout Korea when they discover gruesome bodies floating in the river. CCTV tapes show people jumping into the water and drowning themselves as if they were possessed. Two brothers, Jae Pil and Jae Hyuk go out to solve the mystery and find a cure for this strange disease that causes mental disorder. However, they soon learn that there is a conspiracy going on that they are shocked to discover.