Treachery on the High Seas

In this crime drama, an insurance detective goes undercover to try to bring in a jewel thief. He poses as a gangster and joins a gang. They end up stealing his passport and leaving him unable to return to the US. To get back he must pose as a crewman aboard a ship. He then discovers the purloined gems have been replaced by fakes and falls in love with a female gang member. Eventually his love reforms her and she helps him solve the mystery. He in turn, saves her life. ~ Sandra Brennan, All Movie Guide