Clarissa Edwards has been dating her boyfriend, Robert, for two years, and has been living with him in their apartment for three weeks. Everything has been going fine… until she finds another woman texting him, asking when their next date is going to be.
Pretending to be Robert, Clarissa sets up a date with the woman — this Megan Barry — in order to confront her. But when she comes face to face with Meg she realises that neither she nor Clarissa are to blame; it's Robert who has toyed with them and their emotions.
Teaming up, they decide to work together to make him pay for his betrayal. But as they spend more time with each other, Clarissa and Meg find themselves bonding beyond their taste for revenge.