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.

Alyssa wakes up in a home that's not hers and discovers a dead body. With no memory of how she got there, and no idea of who he is, Alyssa tries to piece together what exactly happened the night before.