Welcome to Shellwater Bay, where the sea is calm, the scenery idyllic . . . and three women are quietly planning a revolution.

Joany appears to have the perfect life, but behind closed doors, she's hiding a dangerous secret. Heather thinks her marriage is rock, solid until her husband demands a divorce. Steph is raising kids with a man who thinks 'helping out' means calling his mother.

Bonded at their gym by sweat and fury, the women swap stories about the silent bargains they've made to keep the peace in their relationships. But peace has its price. And when the simmering rage starts to bubble over, these new friends decide a crime or two is in order . .