Dark and disturbing, this diabolical family thriller revolves around Jake, the eldest son of the Thompsons, Dan and Joyce, who wish to have a quiet dinner together for their wedding anniversary. So they decide to call Anna, a babysitter to take care of their three children, 4-year-old Christopher, 9-year-old Sally, and 11-year-old Jacob.
As Dan and Joyce leave for their special anniversary dinner, the three children begin getting acquainted with Anna, who seems just about perfect; she is sweet, fun and lets them break all their parents' rules. However, Jake begins to realise that Anna is not who she seems.
Her actions soon expose her to be a cruel psychopath and Jake must take on the mantle of protecting his siblings from the increasingly nefarious intentions of a very disturbed woman whose weapon is trust, and whose target is innocence.
It is later revealed that Anna is actually Emelie, a psychotic criminal who is working together with Skinny Man, her co-conspirator, who is spying upon the parents. What tactics will Jake employ to protect his younger siblings? Can he find a way to keep them safe until help arrives? What will the future hold in store for them?