Top assassin Wong Low Get (Edward G. Robinson) hears word that he must end the life of his longtime confidant, Sun Yat Ming (J. Carroll Naish). In his last moments of life, Sun asks Wong to care for his soon-to-be-orphaned daughter, Toya San (Loretta Young). Wong agrees, and takes in Toya as his own. When fellow Chinatown thug Harry En Hai (Leslie Fenton) falls for Toya, it ignites a deadly and passionate love triangle that will test the true depth of Wong's loyalty to his fallen friend.