After the shocking and untimely death of her husband, Shelley Stratton (Catherine Hicks) moves her daughter Alexis (Emily Hurst) and her adopted daughter, Laurie (Alexz Johnson), to their remote summer house in hopes of giving her family a fresh start. As Laurie begins to settle in and put her life back together, she gets the eerie feeling that she is constantly being watched. Laurie's uneasiness grows when people start claiming to see her in places that she has never been. The family's delicate state begins to unravel when Laurie unearths the dark past, discovering a twin sister that she never knew she had. Laurie is forced to delve deeper into her twin's secrets, for as it turns out her twin has been locked up for years! Laurie must now understand their strange connection in order to prevent her sister from taking over her life and harming her loved ones. Based on the book by author Lois Duncan

安德鲁（里德·戴蒙德 Reed Diamond 饰）和妻子贝斯（克里斯汀·戴维斯 Kristin Davis 饰）结婚已经十年之久了，漫长的世间早已经磨平了两人之间的激情。还有三天就是圣诞节了，安德鲁和女秘书金伯利（Danielle Brett 饰）要出差去见一个作者。入夜，金伯利接到了贝斯打来的电话，贝斯的直觉告诉她，丈夫和这个女人之间的关系并不简单。 当安德鲁回到家时，贝斯刚刚打算离开，在追逐之间，贝斯不慎被汽车撞倒，撒手人寰。悲痛的安德鲁回到家中，却发现自己的钥匙坏了，于是在一家神秘的钥匙铺里，安德鲁遇见了天使，天使给了安德鲁一次从新来过的机会，如果他能够证明自己对贝斯是真爱，那么贝斯就会复活。