The Wayland family - Lara and Marcus and their three children - leave England to spend a long, hot summer in Trout Island, Upstate New York. Lara, still reeling from an abortion that Marcus insisted on, hopes the summer away from home will give her time to learn to love her husband again.
A chance meeting at a party reacquaints the family with Marcus's old actor friend, Stephen, with whom Lara once had an affair. Lara feels herself drawn towards Stephen, and they pick up their secret relationship where they left off. Lara knows she's playing a dangerous game; what she doesn't know is that it's also a deadly one.