'Tiger' Haynes is a respected trapper of jungle beasts for zoos and circuses and a doting father to his beautiful young daughter Toyo. When he finds out that she's fallen in love with Bobby Bailey, the son of a wealthy circus owner he frequently deals with, Haynes is initially suspicious of the young man's motives. However, Bailey's sincerity soon wins him over, and they take the river boat to Saigon together to see the young man's father. While on board Bobby meets the femme fatale cougar, Mme. de Sylva, who immediately desires the young man and easily seduces him. In reality, she is Toyo's mother and a notoriously predatory seductress. Tiger adamantly insinuates himself between de Sylva and her latest conquest and seemingly breaks up the romance and returns home to oversee Toyo and Bobby's wedding, but Toyo's mother unexpectedly arrives with the objective of vamping Bobby. In order to avoid having Toyo's heart broken by her mother, Tiger resorts to the 'law of the jungle.'