Kurt's mother withholds her approval of Kurt marrying Fran.
Fran (Ruth Chatterton) has no one now so she calls Sam (Walter Huston) and asks him if he will start over with her. Sam, who has just gotten a new lease on life and found love with Edith (Mary Astor) in Naples, dutifully agrees to return to the states with her.
Even before the ship leaves the dock however, he's had enough of her so he calls for his suitcase, runs down the gangplank, and returns to gentle Edith.
Thanks Mary M!