Snow science shouldn't be this deadly While checking out some puzzling early snow melt in the Sierra Nevada ski resort of Squaw Valley, snow scientist Laura Bailey comes across two women, an environmental lawyer and her anti-fracking activist friend, injured and stuck in deep off-piste snow. Laura skis off for help, but upon her return the women have vanished leaving only tracks leading into a terrifying forest of towering fir and pine trees, and dangerous granite cliffs. Laura's anguish over having left them drives her to investigate their disappearance. Using her combination of dogged persistence, snow science and skiing savvy she takes on the responsibility of finding out what happened to the missing women; what she discovers just might be the end of her.