Former Royal Marine Commando and single mother Sam is brutally kidnapped and wakes up disorientated in what seems to be a deserted military factory. Worried about her baby at home, she finds all the exits sealed, and soon learns she is not alone. Stalked and attacked by an invisible foe she must use all her skills to survive a deadly game of cat and mouse, perpetrated by her kidnapper, a serial killer wearing a quantum stealth suit that renders him undetectable. Surrounded by drones, she unleashes all her ingenuity and strength to get back home in a nail-biting suspense thriller.