The Tick wants a pet and to prove to Arthur he can handle the responsibility, he volunteers to baby-sit for other pet-owning super-heroes. But, as can only happen in The City, those super-heroes have out-of-town business - all at once - leaving The Tick 'in charge' of a wild menagerie of strange super-pets who decide that 'when the owner's away, the pets will play!' Can The Tick and Arthur regain control over 'animals gone wild' before The City is turned into a wilderness itself?