A ruthless scientist, Cal Zimmerman, is being interrogated about an experiment that he performed two years ago. During the same period, Abel, a depressed workaholic in a science research lab, who had lost his wife and only daughter in a fatal accident is shaken by the arrival of a young child completely resembling his daughter. Initially upset by her appearance, he refuses to lose his sense of reason and little by little, he starts to get to know the girl...