After an adventure outside his home to help his owner, Buster now finds himself in the position of helping a lost little cat. Buster, Nova, and Chauncey take to the streets to find the cat’s owner. But this strange stray turns out to be a ghost, and a reunion with its owner is going to be a lot harder than they thought! Will Buster and his friends have what it takes to reunite this lost cat and its owner?

Buster has only one job: keep the house safe. Too bad he is a massive scaredy-cat. When his owner goes away and he suddenly finds his home filled with monsters, Buster has the biggest challenge he’s ever faced. Can he learn to be brave before his owner gets back?