Park Avenue party-girl Mary (Norma Shearer) and staid English nobleman, Lord Phillip Rexford (Herbert Marshall) are married on a lark, they live happily in London. He must travel to America on business leaving her home alone. Lord Rexford's aunt invites Mary on a trip to the Riviera where she runs into an old flame, Tommie Treal (Robert Montgomery). Under the spell of the sea b...