Harold must teach Chester how to be a 'secret service' animal if they are to rescue Bunnicula from some chipmunks, who have trapped him in their tree.

The pets use their detective skills to track down Mina's lost pony in the underworld.

Chester and Harold must get rid of Bunnicula's hiccups before it's too late.

Bunnicula enlists the help of a party expert in order to help loosen Chester up.

The pets go to a monster convention and realize Bunnicula's quite famous.