Trapped in an unsatisfying marriage, Angie Dickinson seeks help from psychotherapist Michael Caine. His surprising advice? Go out there and get some! But it turns out that a cougar on the prowl isn't always the deadliest predator on the food chain. Brian De Palma's gory ode to Hitchcockian thrills is loaded with hairpin turns; it's not only the end you won't see coming, but the beginning and middle, too.