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.”

• Shudder Films
• Goldfinch Studios
• David Bradley
• Abigail Cruttenden
• Holly Weston
• Sam Gittins
• Grant Masters
• Neerja Naik
• Kris Saddler