A distraught widow learns her husband was murdered for his part in a $250,000 robbery. The haul has gone missing, and his former accomplices are soon on her tail in the hunt for the missing proceeds. Not knowing where to turn, she takes up the offer of help from a dashing stranger, but is uncertain whether she can trust him. Romantic thriller, with Audrey Hepburn, Cary Grant, Walter Matthau and James Coburn