A fire at a disused World War II bunker in Belltrees sets off a drain of events that causes disturbance after disturbance in the small community, involving a myriad of characters, from dogs and children to the “subjects” of secret experiments.

Helen, who finds a dying scientist in the park, is entrusted with secret information about the experiments.

Sydney detectives Walker and Spencer join a police taskforce and work diligently to solve the mysteries that surround the events at the Belltrees bunker. Susan, daughter of an ASIO agent initially thought to be an innocent victim, ends up being potentially the worst villain.

When a body is found in Central Park in Sydney in what appears to be backyard surgery gone wrong, Maggie Freeman’s troubles are only just beginning.

It appears as though Richard has something to do with the murder, at least he has been acting strange, though Maggie herself admits that her friendship with Richard is “anything but normal.”

What follows is an intense police investigation into the murder. Meanwhile Maggie is being followed …..

Who is the killer and what do they want with her?