Tin Tan sets off for adventure on the isle of Puerto Rico. This musical comedy takes place in the International Airport of Puerto Rico during a day of carnival. Knowing the problems that go hand-in-hand with the carnival, the airport director appoints a team to deal with a threat from an anonymous letter.
In a New York hospital, a man is cured of heroin addiction after a grueling three-month treatment. Although no longer an addict, he has complete amnesia: the only clues to his past are an expensive ring he was wearing when admitted, and a book of matches from a Puerto Rican nightclub. He pawns the ring and buys clandestine passage on a boat to Puerto Rico in search of his identity.
