The Rook

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 scene in search of her past, Monica discovers a dark truth about one of the victims; 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; Monica goes undercover to attend an EVA auction.

Myfanwy uncovers a twisted relationship with her psychiatrist; Monica searches London with Gestalt for a missing EVA who escaped; Farrier makes a connection with 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.

Myfanwy returns to her childhood home; Farrier faces consequences for the Checquy; Monica copes with the discovery that she was betrayed by Marcus.

After a terrifying prophecy, Myfanwy's desperation leads her to place her trust in a powerful enemy.

Myfanwy and Farrier quickly discover how dangerous life is outside the Checquy, while Grantchester runs out of options; Myfanwy chooses between her freedom and Farrier's life.