An Honest Lie by Tarryn Fisher

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.