Lily (Michelle Chen), a young doctor, wakes up from a car accident and discovers she is living a completely different life. Now married to her boyfriend’s rival, Dr. Mitch Kayne (Sung Kang), and a mother to a 5-year-old son, she has an established life she remembers nothing about.

Everyone around her denies that her boyfriend Neil (Jackson Rathbone) ever existed. As Lily begins to doubt her own sanity, memories of Neil resurface, causing unexplainable incidents. While desperately searching for the truth of her past life, she questions her entire existence.

年輕的實習醫生莉莉車禍醒來後發現自己嫁給了上司米奇醫生，還有一個五歲的兒子，而她對這一切居然毫無印象。同時所有人都否認她記憶中的男朋友尼爾的存在。最終，莉莉毅然決定找出真相的故事。