Shearer is a pretty blackmailer in league with gangster Sherman. She lures men up to her room, and then Sherman bursts in pretending to be her husband. The terrified victim usually coughs up money to keep the matter quiet. After one episode of this kind, Sherman keeps the whole take, so
Shearer robs him and goes into hiding. She meets and falls in love with Brown, the inventor of a revolutionary new concrete mix. When her former cohorts catch up to her, they scheme to bilk Brown out of his money, but rather than betray the man she loves, Shearer turns herself in to the law and is
sent to a reformatory. Brown manages to swing her a parole, and the lovers are happily...