'I'm going to kill her. You'd better come if you want to save her.'

Lorraine — 'Rainy' — lives at the top of Tiger Mountain. Remote, moody, cloistered in pine trees and fog, it's a sanctuary, a new life. She can hide from the disturbing past she wants to forget.

If she's allowed to.

When Rainy reluctantly agrees to a girls' weekend in Vegas, she's prepared for an exhausting parade of shots and slot machines. But after a wild night, her friend Braithe doesn't come back to the hotel room.

And then Rainy gets the text message, sent from Braithe's phone: someone has her. But Rainy is who they really want, and Rainy knows why.

What follows is a twisted, shocking journey on the knife-edge of life and death. If she wants to save Braithe — and herself — the only way is to step back into the past.

This gut-punch of a thriller can only have sprung from the fiendish brain of Tarryn Fisher, one of the most cunning writers of our time.