Soon after Claire is called on to investigate a new case, her ghostly partner Kaz is reunited with his brother, Little John, who joins them in searching for the cause of strange phenomena that occur each afternoon at five o'clock.

When his haunt is torn down and he is separated from his ghost family, Kaz befriends human Claire, who has the ability to see ghosts, and helps her investigate a haunting at the local library.

When the fire station's new dog, Sparky, finds a ghost at the door of the TV room, Kaz and Claire investigate, hoping the ghost may be one of Kaz's relatives.