Joan Grey is a young pianist that falls for the good manners and nice clothes of a gang of mobsters. She is warned by Mark Hampton, an investigator, that she is associating with gangsters and she is heading for trouble. She refuses to believe him and becomes innocently involved in some robberies and killings.

A Texas oil millionaire, after failing to secure oil lands in Argentina, seeks out a famous racehorse in Buenos Aires and orders his representative to buy the nag at any price. The representative, Tim Kelly, has a love affair with Lolita O'Shea, the beautiful daughter of the prize horse's owner.