In this sci-fi film, Terence Stamp (the name of the character as well as the actor who plays him) is an aging actor enlisted to participate in an experiment involving time travel organized by his former mistress. With her assistance, he travels into the past where he witnesses the death of his wife. He then zips into the future. He soon learns how to time travel without the help of the woman. He uses his knowledge to travel into the past, reunite himself with his wife and face death together with her.