The murders are committed in swift succession on board a liner crossing the Atlantic in a dense fog, and many of the passengers come under suspicion before the actual killer is bought to justice with the aid of a very substantial "ghost."
Practical Effects
Fog-drenched ship sets that actually feel claustrophobic
Writing
Pre-Code snark that ghost-solves before Scooby-Doo existed
Director
Albert S. Rogell
Trivia, insights & behind the scenes
This was one of six films Mary Brian made in 1933 alone — Hollywood's pre-Code assembly line was ruthless.
The 'ghost detective' gimmick directly rips off 1932's The Phantom of Crestwood, proving 1930s Hollywood loved stealing from itself.