Between working full-time, raising a young son, and trying to maintain a relationship with her detached husband, James, Lauren Bell desperately needs some help in watching her newborn, Riley. Thinking she's found the perfect solution, she hires her neighbor, Owen, to be their nanny. Owen is exactly what the Bells need and Lauren couldn't be happier. It isn't long, though, until Owen crosses the boundaries between hired help and man of the house.

A scheming con artist poses as the innocent babysitter "Amber" to steal from a wealthy occult enthusiast with a reclusive son, Kevin. Her crew arrives to clean out the house just as Kevin stumbles upon a prized artifact and unwittingly summons a trio of witches known as The Three Mothers.