Right next door to each other in a tenement row live two families named Casey. Casey No. 1 and his family are old residents who look condescendingly upon the newly-arrived Caseys and refuse to mix with them, and a feud arises. Caseys No. 2 indulge in concerts on their house organ, which backs directly against the party wall of Caseys No. 1, who are driven almost frantic. To counteract this Casey No. 1 hires a street band and overwhelms the noise next door. Matters are brought to a crisis when a burglar is discovered by the two Caseys loitering in their back yard. Both of them take their revolvers and together capture the burglar. Each one is ambitious to claim the credit. During the wrangle, the burglar escapes. Casey No. 1 accuses Casey No. 2 of interfering with his effort to protect his home and property. They flourish their revolvers and things wax hot when a policeman appears and takes them in, charged with attempt to kill. Fortunately, a policeman has seen the burglar in flight, arrests him, and brings him into the station house and the presence of the Caseys. Explanations follow and both Caseys are discharged. So overjoyed are they and their families, that a truce is declared. Peace and happiness now reign where discord once prevailed.