In a war-torn future where machines have nearly extinguished humanity, a deadly cyborg assassin is sent back through time to eliminate a woman whose unborn son will lead the resistance against the machines. Unaware of her crucial role in humanity's survival, the woman must evade her relentless mechanical pursuer while a human soldier from the future arrives to protect her. As the hunter closes in with unstoppable determination, she discovers the terrifying truth about her destiny and must find the strength to survive the night that will determine mankind's fate.