AMOS receives a surprise visit from GRANDPA as he recently returned from a trip to China. Amos convinces Grandpa to join him in swim practice and teach MICHAEL, the bully, a lesson. But Grandpa turns out to be friends with COACH, and even tasks to oversee the boys’ training for a looming competition. To make matters worse, Grandpa grows impressed with MICHAEL’s commitment to training. With Grandpa now on Michael’s side, Amos’ plan has completely backfired.