Audrey teaches postnatal fitness to a group of Moms who bring their baby strollers to the park, but when her recently hired assistant secretly starts exacting revenge, Audrey's perfect world erupts into madness.

Dr. Hope Connors escaped her stalker and decides to move her family to the suburbs for a fresh start. But when odd signs that her stalker is back start up again she is thrust back into her fear and paranoia.