A top undercover cop finds and arrests a series of purse snatchers until he discovers an American at the top of an evil ring of thieves.

Intransigent magistrate Viola Orlando is targeted by her rivals who set her twin sister Rosa — a high-class prostitute and pornographic photo-novel star — up to impersonate Viola and demolish her reputation. To complicate things even further, Viola is torn between enforcing the law or giving up her seat on the bench to marry her childhood friend.