The film initially focuses on elections for the position of police commissioner, with Gildersleeve as a candidate. He tries to boost his chances by investigating a series of questionable scientific experiments. But Gildersleeve's sanity is questioned when he meets the ghosts of his own ancestors, an invisible woman, and a gorilla.
Plot
Gildersleeve is running for police commissioner against the incumbent Haley. He believes he can boost his chances by exposing the questionable experiments being conducted by scientist Wells. His attempts to do so are somewhat hindered by the ghosts of two of his ancestors (both also played by Peary), as well as an invisible woman and a lovesick gorilla—and naturally everyone thinks he is losing his mind.
Cast
Harold Peary as Throckmorton P. Gildersleeve / Ghost of Randolph Q. Gildersleeve / Ghost of Jonathan Q. Gildersleeve