Big Boy's mother takes in washing to make ends meet. An irate customer demands money for damaged clothing, but Mother has no money to give her. Big Boy decides to sell his beloved dog and sets out to find someone to buy him. A few different slapstick adventures follow, culminating in Big Boy and Mutt making a mess of a rich family's home. In the scuffle the boy and the dog are separated, and Big Boy returns home in tears. His mother consoles him, and the door swings open, revealing Mutt.