NIKKI McCHRISTIE.
Editor

When a crew member is found dead aboard the Trident nuclear submarine HMS Vigil, the police begin an inquiry. Vigil must remain on patrol in order to maintain the UK's nuclear deterrent, so Detective Amy Silva is forced to join the crew on board to conduct her investigation. Meanwhile, Detective Kirsten Longacre follows leads back on land. As the two pursue parallel trails, the case grows more sinister and broadens to include the highest levels of government and the British Navy.

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Starring: Suranne Jones, Rose Leslie, Shaun Evans, Paterson Joseph, Adam James