Jimmy is promoted on the police force, and begins the investigation of a murder involving the infamous Muller gang.

In reality he is a powerful racketeer and bootlegger, but he keeps his two personas separate in order to protect his family from any consequences of his criminal activity.

However, eventually Jimmy's fiancé, Kathleen Doyle, attends a party thrown by Muller at one of his houses.

During the party, she inadvertently learns that Silk is a killer hired by Muller, who was responsible for the murder her fiancé is investigating.

He and John rush off to warn Jimmy, but as they arrive at the ambush, Dennis saves his brother, but gets shot by his own men instead.