Peter unwillingly tolerates the authority of his uncle, Judge Flower, and decides to break up a project that has become unacceptable to him. Together with Janet, a rather "free" type of girl, he organizes a "little party" for the stern magistrate. However, troubles begin in the apartment. Joseph, the old servant, is found dead, and they themselves are targets for the bullet of the killer. In fact there is a gang which has decided to eliminate the magistrate and they now take Peter as a hostage. When Flower appears, events in the apartment move fast. In a last desperate escape, Peter manages to get the better of his captors and the siege is over, but unfortunately Janet pays for her involvement with Flower, with her life.