Twelve Plus One

Mario Beretti (Vittorio Gassman) is a young Italian-American barber. He runs a barber shop located near a construction site that boasts few customers. His life reaches a turning point when he is notified of the death of his aunt living in England, who named him her sole heir.

Mario rushes to England and learns that his inheritance consists of not much; only thirteen antique chairs that have a certain value. He sells them in order to cover his transportation costs, but soon learns from his aunt Laura\\\'s last message that inside one of the chairs is a fortune in jewels. He tries to buy back the chairs, but is unsuccessful in doing so. With the help of lovely American antiques dealer Pat (Sharon Tate), working in the antiques shop in front of Aunt Laura\\\'s house, where he sold the chairs, the two then set out on a bizarre quest to track down the chairs that takes them from London to Paris and to Rome. Along the way, they meet a bunch of equally bizarre characters, including the driver of a furniture moving van named Albert (Terry-Thomas); a prostitute named Judy (Mylène Demongeot); Maurice (Orson Welles), the leader of a traveling theater company that stages a poor version of Strange Case of Dr Jekyll and Mr Hyde; the Italian entrepreneur Carlo Di Seta (Vittorio De Sica); and his vivacious daughter Stefanella (Ottavia Piccolo).

The bizarre chase ends in Rome, where the chair containing the jewels finds its way into a truck and is collected by nuns who auction it off to charity. With nothing much left to do as a result of the failure of his quest, Mario travels back to New York City by ship as Pat sees him off and waves goodbye to him.

The film ends with Mario returning to New York City and to his barber shop. His friends over at the other (and more lavish) shop join him, as do two construction workers and his last customer Randomhouse (Lionel Jeffries). It is there that Mario makes a strange discovery: shortly before his departure for Europe, he invented a way to make hair regrow miraculously. He then laughs ecstatically over his discovery.