Charlie Chan's Murder Cruise

In Honolulu, Charlie Chan's home, a Scotland Yard detective is murdered in Chan's office as he is about to reveal the identity of an international killer. When clues point to the murderer being one of the passengers on a ship bound for San Francisco, Charlie Chan decides to join the cruise with his "Number Two Son" Jimmy. More murders and intrigue take place before Chan is able to announce the identity of the killer with the help of the supposedly "blind" widow of the first victim.