Former detective Nick Charles has retired from police work, preferring a life of cocktails, parties, and relaxation with his wealthy wife, Nora. Their holiday is interrupted when the daughter of Nick’s former client asks for help finding her missing father, eccentric inventor Clyde Wynant. When Wynant’s body is discovered, Nick is drawn back into the investigation, with Nora eagerly joining him. As the couple questions Wynant’s family, friends, and business associates, a tangled web of greed, deception, and murder begins to unravel.