When Gilberto Ramnes and his wife Greta divorce, she sells him back his favorite necklace. He meets Francine, a blonde American vacationing in Havana, and begins to pursue her. His assistant Lindström suspects she's there to steal from Ramnes. And when Ramnes discovers that Greta sold him a fake version of the priceless necklace, it turns out that Francine knows a thief who might be able to help ...