The teenage sisters Emma (Sofia Black-D & Elia) and Stacey (Analeigh Tipton) live a normal life, until their small suburban neighborhood is struck by a mysterious virus. parasite. As the disease spreads rapidly throughout the city, the two band together to protect themselves from infection. But it may be too late – when the virus comes in, the sisters are faced with an impossible choice: to protect one another or survive the virus.