The Man Who Used to Be Me

The policeman Sam Ryan is well decided to follow the traces of his father, also a policeman, he loves. But, the former is assassinated. A short while after, a man whose description corresponds to the suspect number one knocks at his door. Sam prepares to arrest him when the stranger presents him as a friend of his father, who is also seeking for the murderer. This one soon reveals to Sam the incredible truth : he is Sam himself and has used a time machine to ascend time to atempt to prevent the murder of his father...