Across to Singapore was the second screen version of Ben Ames Williams' All the Brothers Were Valiant, first filmed in 1923, and later remade in 1953. The plot is motivated by the deadly rivalry between two seafaring brothers, virtuous deckhand Joel Shore (Ramon Novarro) and wicked Captain Mark Shore (Ernest Torrence). Forced into a marriage with Mark, Priscilla Crowninshield (Joan Crawford) tries to be loyal to her husband but falls in love with Joel instead. Things reach a fever pitch when mutinous first mate Finch (James Mason) strands Shore in Singapore and takes Joel and Priscilla prisoner. Mark catches up with his ship and kills the mutineers, but when he realizes that his wife is now deeply in love with his brother, he considerately sacrifices his own life in the climactic melee.