Zombies are killing all the animals in Marshfield Grove Cemetery, and it is up to Barry Bannon and his friends to defeat the zombies and rescue the ghost dogs that they have trapped in a pit.

Stan Summer has been attacked by mysterious balls of light in Hilltop Cemetery and he and his new friend Amy need to solve the mystery of who these ghosts are and what they want.

"Barry's usual walk through Marshfield Grove with his dog Lucy turns ominous when they find blood and encounter the ghost of Byron Mumford. Byron's been disturbed by zombies in the cemetery, the same zombies Barry and his friends fought a few months ago. While Byron issues his warning, a zombie sneaks up on Barry! Barry and Lucy barely escape. He devises a new plan with the Zombie Hunters to make the undead permanently dead. But can they trust Byron's...

While in Mystic Seaport, Connecticut, Joey and Tank board a whaler that is on display and soon find themselves part of its ghostly crew.

After spotting a mysterious ship while night fishing near Lynn, Massachusetts, Joey and Tank follow ghostly pirates into a cave that Joey's uncle tells them is rumored to hold a long-lost treasure.

While on a school field trip, Joey and Tank encounter a ghostly captain aboard a historical ship and, upon their return that night, travel through time and become involved in the Boston Tea Party.