The childhood bond between a fox cub and a hound puppy seems indestructible until they grow up and face the reality of who they are and how they are supposed to treat each other, which puts a strain on their friendship.
Continuing the events of the first part, we see (Copper) the hound pup dog, as he becomes interested in music, which leads him to join a group of singing dogs, but this affects the time he spends with his friend (Todd), which makes him sad and puts their friendship at risk.