Marathon is Steve's dog. Steve loves to run (as we can see from his dog's name), but Marathon prefers to eat and sleep. Steve always took Marathon on his runs and although he didn't like running, he always followed along because he was a good dog and loyal. One day, Steve and Marathon were out running and Steve hurt his ankle. Steve is no longer able to run and Marathon is very concerned because he sees his Steve is in pain. The doctor tells Steve that he has to stop running, but if he wants to keep exercising, he can try swimming because its less strain on his joints. Steve is sad because he can't bring Marathon to the pool, but when Marathon hears this, his tail starts wagging uncontrollably with excitement. The make a deal that Marathon will "guard" the apartment while Steve is at the pool and Marathon still gets to go outside fro short walks and to play at the beach. ( )

Marathon has difficulty sharing his master's enthusiasm for their daily run. Then an injury suggests an alternative form of exercise.