The Fighting Doctor (1926)

Dr. Frank Martin, just as he is opening office for the day, meets "Chug" Wilson, owner of the local gymnasium, and George Stafford, who demands that the doctor make a call at the Sanders house. There he finds Malcolm Sanders and his daughter, Susie, caring for Jimmy, a cripple suffering from measles. Stafford resents the fact that Susie and Frank are attracted to each other; and as the two men are coming to blows, Wilson invites them to the gym to fight it out. Jimmy's measles are cured, and with exercise in the gym, his leg begins to mend under Frank's care. Stafford schemes with "Scissors" Lomski, a professional wrestler, to stage a match, designates Sanders as trustee of the prize money, but substitutes old paper for the money. Frank learns of the swindle and proceeds to thrash the culprits but is downed by foul play. At the wrestling contest, while Lomski is being beaten, Stafford abducts Susie, and Frank pursues in a car, then in a speedboat, to rescue her.