Caine, the dog that loves to go to work with his "guy" in the old blue truck, is back with another lesson to learn and pass on to his friends. When Caine sees the jealous behavior of a boy on a baseball team, he realizes there is a lesson to be learned and that the same lesson could be taught to a friend dealing with a new member of the family. Jealousy and bad sportsmanship does not belong on a baseball team or in a friendship.