The Captain Hates the Sea (1934)

Alcoholic newspaperman Steve Bramley boards the San Capador for a restful cruise, hoping to quit drinking and begin writing a book. Also on board are Steve's friend Schulte, a private detective hoping to nab criminal Danny Checkett with a fortune in stolen bonds. Steve begins drinking, all the while observing the various stories of other passengers on board, several of whom turn out not to be who they seem to be.