After waking up surrounded by dead bodies and no memory, Myfanwy Thomas is thrown into the world of the Checquy, a paranormal secret service where she's a high-level operative known as a "Rook" - and no one can be trusted.

While Myfanwy revisits the crime in search of her past, Monica discovers a dark truth about one of the victims - her lover and fellow agent. One of Myfanwy's dead attackers disappears from the morgue.

Myfanwy discovers a disturbing clue to her past, Farrier searches for a scapegoat for the bankside murders, and Monica goes undercover to attend an EVA auction.

While Myfanwy uncovers a twisted relationship with her psychiatrist, Monica and Gestalt scour London for a missing EVA who escaped after auction. Farrier makes a connnection wih a mysterious prisoner.

Myfanwy and Monica work to extricate a young EVA, while Gestalt's suspicions of Myfanwy lead to a confrontation. Farrier is suspended, only to seek powerful revenge.