One of his sons, Terry Murphy (Dick Purcell) is a police officer trying to get a promotion so he can marry Kathleen (Julie Warren).
The other son, Joe Murphy (Charles Quigley), works for a shady businessman named Moran (Edward Keane) who owns a trucking business.
After Joe overhears other men talking badly about Running Wild he calls Moran's office to confirm the name of the horse and is not able to make the bet in time.
After the race is over Joe knows he's gonna be in bad trouble if he doesn't give Moran the payoff, so he tries to call Daisy just before attempting to slip away.
Stunned by the recent bad news, Mrs. Murphy (Lillian Elliott), Terry and Joe's mother, has a heart attack and is hospitalized.
Mike then goes to Joe's hotel to tell him he took care of his debt and urges him to visit his mother in the hospital, which he does while Kathleen happens to be there.
Moe, the cab driver, is the only witness that can attest to Joe's innocence, and Daisy promises Terry she will find out some information.