In San Francisco, Kirby is introduced to Muttville, a group of dog-lovers who help senior dogs find new homes. On his first day, Kirby gets up close and personal with the sometimes messy world of senior dog care. Can he get these dogs ready for adoption day?

Kirby speeds to Madison, Wisconsin, to team up with Free Bikes 4 Kidz, a nonprofit that gives disadvantaged kids their very own set of wheels. It takes time and muscle to polish the donated bikes until they shine, but Kirby and the team have a pretty good motivation: big smiles from 1,000 lucky little riders.