Cassie Penbrook decides she's had enough of men invading her and other women's personal space and thinking they can treat women however they want. She places an ad in the local paper to form a group for women to vent about men.

Cassie, along with the other women, ends up killing an abusive man and covering up his murder. One thing leads to another, and before she knows it, she has notched up two murders and is already planning a third.

As she wonders whether she's spiralling out of control, she tries to hold down a relationship with one of the few decent guys she's met. However, one of the other group members has a dark secret.

Can Cassie ever return to having a normal life, or has she gone too far to go back?