Clarence is a ribbon salesman in a department store and is infatuated with Betty, a lovely sales girl in the same store. Clarence has a rival, "Bull" Mulligan, the lightweight champion pugilist. Accompanied by his manager and trainer, "Bull" comes to the store and interrupts Clarence's attempt to win Betty by pushing his face in. He gives Betty a ticket to his benefit and then forces a complimentary on Clarence, advising him to see him knock out all comers. Clarence is so annoyed that he visits Professor Small's boxing academy and takes lessons in the manly art. He acquires a dark optic as the result of his first lesson. The next morning the boys and girls at the store have fun at Clarence's expense. He is excused and again goes to the boxing academy, this time acquiring more knowledge of the game. The night of the benefit Clarence attends, challenges the champion and knocks him out. Betty has a change of heart, rushes out to the stage to embrace him, but is haughtily rejected as Clarence is heartily hailed as the new "champ."
—Moving Picture World synopsis