Hector Brown, affectionately nicknamed "Humdrum" by the residents of Norwalk because his life is so monotonous, wants to marry Alicia Boothe. Humdrum's brother-in-law, Ed Danforth, spends all of his money on get-rich-quick schemes, however, so the young bank clerk is forced to support the entire Danforth family. After Danforth and bank president Carlos Tanner rob the bank in which Humdrum is employed, the bank is forced to close, and Humdrum goes to San Francisco to look for a job. In his absence, Alicia inherits a large sum of money and travels to the city to find her fiancé. There she meets Tanner, who takes her money, promising to invest it for her. Having been double-crossed by Tanner, Danforth tells Humdrum the truth about the bank robbery and then goes to the police. Humdrum catches the steamer on which Tanner is about to depart, holds the crook until the police arrive and returns to the Norwalk bank with the stolen funds. He and Alicia marry following his appointment as president of the bank.