Horrors of Malformed Men

The medical student Hirosuke Hitomi is mysteriously interned in a mental institution without any explanation. When a stranger tries to kill him in his cell, he flees from the asylum and sees the young woman from the circus Hideko singing a lullaby that stays in his memory. She tells to him that she is from a coastal town, but out of the blue, Hideko is murdered. Hirosuke travels to the coast and learns in the newspaper that the wealthy Genzaburo Komoda, who is his doppelganger, has just died. He decides to assume his identity as if he had had only a sudden illness and revived. He lures his wife Chiyoko Komoda, his mistress, the butler and the servants. When mysterious letters are delivered to his wife, who dies, and his mistress, he decides to travel to the island where Genzaburo's father Jogoro Komoda lives to find his origins. Soon he meets Jogoro, who is a mad man that built an island of freaks, turning normal persons into malformed persons. Further, Hirosuke learns who he is.