A troubled student has accused biology teacher Serena Diaz of sexual misconduct, cutting off her promising career just as it was starting to blossom. When a therapeutic walk in the woods leads her to a ruined house overtaken by criminals, Serena is assaulted and finds herself witness to the senseless murder of the one man who tries to help her. Hurled into a world of false accusations and hounded by the press, Serena must confront evil itself to unravel the mysterious visions that pursue her. But she can't ignore the most haunting question: why would a mysterious stranger give his life to save hers?