A couple hires a woman to care for their disabled son. After noticing some odd behavior from the caregiver, Olivia, the mother decides to take a closer look. Olivia's dark past emerges and endangers all who come in contact with her.

A woman wakes up locked in a house, injured with no memory. She's terrified and a little relieved to find a woman bound in another room. These two strangers must work together to figure out what's really going on before the door is unlocked.