Charles Chaplin wrote, directed, and scored this old-fashioned romantic comedy, which proved to be his last film. Wealthy American diplomat Ogden Mears (Marlon Brando) is sailing from Hong Kong to Hawaii, where he hopes to meet and reconcile with his estranged wife Martha (Tippi Hedren).
However, while the ship takes on passengers in Hong Kong, a stowaway slips into Mears' suite. Natascha (Sophia Loren) is a White Russian countess who was forced to flee the country following the revolution and ended up in Hong Kong, where she earns a meager living as a dime-a-dance girl in a sleazy ballroom.
When Mears discovers that Natascha is an uninvited guest in his quarters, she begs him to help her emigrate to the United States; when he refuses, Natascha tries a new tack, threatening to tell Martha that they've been sharing a stateroom if he doesn't cooperate.
Mears grudgingly allows Natascha to stay with him and keep her secret until he can figure out a clever way to get rid of her. Margaret Rutherford has a showy supporting role as an eccentric passenger, and Chaplin gives himself a silent cameo as a bumbling porter (no fewer than four of his children also appear).