Connie Mack's Athletics is Marguerite Johnson's conception of all that a ball team should be, and Home Run Baker is her favorite hero. When the great ball player knocks out a home run during the course of the game which she attends, Marguerite is ready to worship him. As fate would have it, Home Run Baker saves Marguerite from injury that day and the two become friends. Wallace, a swindler, learns of the friendship and plans to take advantage of it. With the aid of Chick Day, who closely resembles Home Run Baker, the man sends Marguerite a note requesting a loan. The girl meets Home Run Baker's double the following day, and is about to give him the money, when the real Home Run Baker, who has gotten wind of the scheme, arrives and puts the crooks to flight. The new Federation League tries to persuade Baker to jump the Athletics. His mother's illness keeps Baker from joining his team the following spring. The rumor spreads that the famous ball player has decided to leave the American League. To check this talk, Baker departs for the spring training quarters. Marguerite's father is interested in the Federation League. Wallace again plans to take advantage of Day's resemblance to Home Run Baker. The crook calls upon Johnson and offers to secure Baker's signature to a contract. Marguerite sees the crooks closeted with her father. Suspecting something wrong, the girl summons Baker. The athlete jumps into Marguerite's auto and is driven to the house. The impostor is just demanding advance money, when Home Run Baker enters. Filled with rage the ballplayer trounces the crooks and saves Marguerite's father from being defrauded.
—Moving Picture World synopsis