Steven Grant, an unassuming employee in a souvenir store, suddenly experiences memory loss and is haunted by visions of another life. He discovers that he suffers from a dissociative identity disorder and that he shares the same body as a mercenary, Marc Spector. As the noose tightens on Steven/Marc, the two men, plunged into a perilous adventure among the powerful gods of Egypt, will have to find their balance in this double identity.