A kindly English botanist and a gruff American promoter lead an expedition to the Himalayas in search of the legendary Yeti.

An embittered Louie Peronni returns from prison to find that his sister, Juli Peronni, is engaged to policeman Eddie Farrell, and also finds that his secret wife Annie Qualen has placed their baby girl in a foundling home. With his old gang again, Louie plans a robbery of a fur warehouse. Louie shoots down the night watchman and is trailed home where his father Guiseppe Peronni persuades him not to fight it out with the police. Determined to let Louie take the full rap, the gang kidnaps the district attorney's daughter.