When his flight is delayed coming home from a business trip, Keith Mitchell has to leave his daughter Alexis, who’s stuck at home under house arrest, alone for the night. Once Keith is finally in the air with full bars of WiFi, he notices a stranger enter the house on his security system. Unable to warn Alexis when the WiFi suddenly cuts out, Keith sits helpless from 30,000 feet in the air while his daughter fights for her life.