Special agent Harry Tasker gets out of the water outside a heavily guarded mansion, takes off his wetsuit, and there is a dinner jacket underneath. Harry strolls into a swanky party. Harry meets with Juno Skinner, steals some computer files, and escapes in a blaze of gunfire. He's picked up by his partner, Albert "Gib" Gibson, and they return to the United States. Harry goes home to his wife Helen. Helen doesn't know what Harry does because he pretends to be a computer salesman. Their 14-year-old daughter Dana is a sullen teenager, and Helen is so bored by the routine of her life that she's on the verge of having an affair with used-car salesman Simon, who claims to be a spy.