Bill Holmes (Matty Kemp) rescues Rinty (Rin-Tin-Tin) from a car wreck, not realizing that a stolen $50,000 diamond necklace is hidden in the dog's collar. He discovers this fact when he falls into the hands of a criminal gang. Mary French (Evelyn Pierce), a member of the gang but sick of it all, and Rinty help him escape. With the reward money the young lovers begin their honeymoon.—Pamela Short