 Johnnie, a prizefighter, is unwittingly involved in a murder, and, unable to prove his innocence, quits boxing and flees to Arizona. He obtains work at a fruit ranch run by a kindly woman known as Grandma. The ranch is worked by delinquent boys for whom Grandma provides a home. Johnnie teaches the boys to box and begins to gentle under the influence of the old woman and her daughter, Peggy. Then a New York police detective shows up...