Natalie, a single mom, can’t afford medical treatment for the unexplained pain in her foot, so she tries to improve it on her own by quitting running and turning to yoga. During the meditation component of class one day, she follows the instructor’s prompt and envisions opening a door to a better future. Instead, she unlocks something far more a portal to another realm. After she begins experiencing frequent blackouts, Natalie fears she will lose herself completely to the force controlling her body. Someone—something—has been waiting for this opportunity, and it won’t give up without a fight.