Major Terry Knight, ex-special forces black-ops specialist, now recently retired due to injuries received during his last tour of duty, buys a very old and isolated manor house deep in the country, close to the sea and moves in with his family to enjoy the peace and quiet. Unfortunately, things do not go to plan! A series of rumours, innuendos and worrying occurrences and the discovery of a hidden laboratory deep down below the house puts Terry and his family in harm's way. He follows his intuition and finds that the house and surrounding area hide a terrifying secret kept for the last 20 years. Persons unknown will stop at nothing to preserve and benefit from this. The body count, already high, continues to grow unabated. Terry meets up with an old colleague who helps him work out what is happening and with support from a shadowy person from Group, the name of his old command. All of them are put in terrible danger before the truth is finally revealed in the old mine shafts and tunnels beneath the manor house where they confront their enemies and come face to face with the terrifying guardian protecting the secrets. An explosive finale takes place at a nearby airfield before the plot concludes.