Inspector Duff of Scotland Yard is called upon to investigate a murder amongst a group of tourists on an around-the-world cruise. Duff joins the cruise and learns certain facts about each of the suspects, but is himself shot. His friend, the famed Honolulu police detective Charlie Chan, comes aboard the vessel to take …

Aviator and band leader Roger Bond is forever getting his group fired for flirting with the lady guests. When he falls for Brazilian beauty Belinha de Rezende it appears to be for real, even though she is already engaged. His Yankee Clippers band is hired to open the new Hotel Atlântico in Rio and Roger offers to fly B…