16-year old Arielle's world is rattled when her mother mysteriously returns, driving a wedge into the seemingly perfect relationship she has with her father while unraveling family secrets hidden long ago on their isolated foothills farm.

While adjusting to a new life in the suburban community of Aspen Ridge, a recently divorced mother of two receives mysterious letters instructing her and her teenage children to kill the people in their letters before they kill them. Paranoia and chaos ensues as the family attempts to rationally deal with an irrational situation.