Although she is the mastermind of a gang of crooks, Kate Westhanger's talents are unknown to those outside her circle, thus enabling her to infiltrate George Flanbaugh's gold syndicate. While ostensibly working for Flanbaugh, Kate actually is compiling information on a large gold shipment. One day, while working, Kate meets young criminologist Michael Pretherson, and although finding herself attracted to the sleuth, she laughs at his detective work and challenges him to stop her. He fails, and after successfully robbing the gold shipment Kate is enraged when she learns that the gang has decided to disband. Her actions inflame the crooks, who capture both Kate and Michael and are about to kill their prisoners when the police arrive, igniting a fight in which all the criminals except Kate are killed. Realizing that her love for Michael has extinguished her desire for crime, Kate returns the gold, is exonerated and weds Michael.