After a famous scientific pioneer, Gordon Dunn, reveals a new piece of technology that will change the world, he dies under mysterious circumstances. His wife, Carolyn, becomes a recluse until a man, Sam Bloom, shows up at her home claiming to be someone from her husband's past who wants to use Gordon's technology to find out the truth about his death. The device makes it possible for the user to extract, save and replay anyone's memories. Although Sam has questionable motives, Carolyn allows him to use the machine. Sam soon discovers during his investigation that some memories should remain buried...