8-year-old BREE is a very hyperactive, cheerful girl. She loves ballet and classic music. She’s a smart, caring and mature for her young age. However, losing her twin sister, Becca, to leukemia a month ago has brought sadness into her home. Grieving, her parents, HARRY and BLAIR decide is best for her and her teenage sister JESS to move out and find some piece of mind. As scary situations develop, her parents decide to move out. Bree doesn’t want to leave the house but she has no choice.
Chloe, an eleven-year-old girl, has spent her whole life underground. When she finally discovers there's more to life than the confines of a subterranean facility, she ventures to the surface. There, she quickly understands why her family and friends cautioned her; the surface world is overrun with monsters and terrifying mutants that threaten her life at every corner...