A dysfunctional family awake on Christmas morning to discover they’re sealed inside their house by a mysterious black substance. On television, a single line of text reads: “Stay Indoors and Await Further Instructions.” David Bradley, Abigail Cruttenden, Holly Weston, Sam Gittins, Grant Masters, Neerja Naik, Kris Saddler Added on Amazon Prime 2023-02-06. Youtube Trailer