The year is 1953. You and the other residents of a NYC tenement building have been locked inside for nearly a month after threats of a biological attack have forced you to quarantine.
The doors are boarded up, the weapons are loaded, and the food has run low.
Your closest friend in the house is Joanna. She moved in to stay with her Aunt Martha just before the lockdown. She’s quiet and mostly keeps to herself, but you’ve heard Martha warn the other adults about Joanna’s “darkness.”