When Marie Vasquez was twelve, she escaped the thing in the woods. But people forget that she wasn't alone. Jonas Vogt was with her that morning, and that was the last time he was seen. Now eighteen, Marie is held responsible for her own actions, actions that she swears aren't hers. Left with no other option, she runs back to the cabin she escaped so long ago and answers old questions, including the question of whether promises stand when circumstances change.