Bad Influence 1990

Directed by Curtis Hanson | Starring: Rob Lowe, Marcia Cross, James Spader, Lisa Zane

Wimpy young executive Michael is about to get pulverized by a jealous boyfriend in a bar when a handsome, mysterious stranger steps in—and then disappears. Later that night, Michael runs into a stranger on a pier, who wheedles his way into Michael's life and turns it upside down.