2Cat is meant to be marrying Stephen after a whirlwind romance. So why is she now waking up on a small Welsh island, still in her hen party outfit? She initially thinks it's a pre-wedding prank - but soon it becomes apparent that the reality is much more sinister. Along with Greg, the man who discovered her when she woke by the beach, Cat is drawn into the web of intrigue which has entangled both her fiance and her best friend...