After the devastation of WWIV, humans have become virtually extinct and left the rest of the animal kingdom for themselves. Several decades of evolution later, the animals have grown in both population and human-like intelligence. Bucky is the last human on earth, and not everyone is a fan of his human history. He faces constant harassment and discrimination from his animal classmates to which he dreams of eradicating. It's not until he saves an all-powerful killer whale that his simple act of kindness becomes an endless cycle of pandemonium.