The family and Reuben board the T.S.S. Fairsea, a cruise ship, to play a singing engagement while sailing to Acapulco. On board, Laurie meets a young man who introduces himself as Howard Wainwright III, the heir to a large fortune. Despite Wainwright's clumsiness and his attempts to impress everyone, Laurie agrees to go out with him. Keith is suspicious of the young man's intentions and enlist Danny's aid in spying on them. A few days later, Howard gifts Laurie with an expensive bracelet that he claims is a family heirloom, but which Keith believes to be the stolen property of a wealthy passenger. He's convinced that Howard is an international jewel thief who is using Laurie to smuggle the stolen bracelet through customs. Keith, Danny and Reuben concoct a scheme to steal the bracelet back and return it to the rightful owner during the ship's costume party. At the party, the idea backfires and the trio is caught. (thetvdb.com)