MI5 Weapons Tech Ros Knight (Jeanine Nerissa Sothcott) finds herself unexpectedly called into a Black Ops mission headed up by her Field Agent boyfriend Hugh (Geoffrey Moore). Their goal: intercept a deadly bioweapon before it can be unleashed on British soil. When the mission goes fatally wrong, Ros finds herself on the run with a target on her back and must turn to the only man she can trust, her estranged father - legendary retired spy catcher Charles Knight (Ian Ogilvy). With a deadly mercenary squad on their heels the three must work together to survive a terrifying home invasion and prevent the weapon from falling into enemy hands.