A lonely woman falls into a whirlwind romance with her handsome colleague, only to find that he harbors a sinister secret that may be the death of her. Cate was in Los Angeles working on a major project for a prominent architectural firm when her professional relationship with Harrison began to turn personal. Meanwhile, Cate also grows close to Harrison's mother Evelyn, who reveals that her son has never been the same since his high school sweetheart vanished without a trace. When Harrison proposes to Cate it feels like they're meant for one another. But just then, Evelyn falls ill with cancer, and Cate starts to experience some disturbing signs of sickness. Things turn tense when Cate starts to suspect that Harrison is poisoning her just as he did with his old flame, but by the time she uncovers the terrifying truth about her fiancÚ's past, it may already be too late for her.