A man with amnesia is forced to steal against his will by a disembodied head. He is a robot, and the head belongs to his creator. When the police trail the robot home, the scientist tries to escape, but he and the robot end up falling to their deaths.
Blake travels back in time through a crevice in a mountain side where he frees a good man and falls in love with a beautiful girl. To protect his new friends he returns to the present for a weapon, but when he tries to rejoin them the crevice is gone and he is stuck in the present.
The paintings of Jean Malreaux put their owners into comas. Hector Abbott notices the paintings lack the color green and deduces that the painter is an impostor with an aversion to the color green, striking out at people associated with that color.