当妻子成为一宗暴力罪案的受害者后，年青的丈夫带着妻儿搬到了一个科技先进，守卫森严的社区来逃避外面世界的种种危险。但是患上妄想症的妻子Kathy开始琢磨一连串的残忍谋杀案和新邻居的晚上驾车是否有牵连......

In Arizona, the veteran Detective Miles Porter becomes obsessed about catching the murderer of his goddaughter, Cindy, and three years later he requests his retirement to dedicate himself to the case in full time. Meanwhile in California, Richard Alden, his wife Kathy, and their son, Sam, moves to the expensive condominium Hidden Glade Estates seeking security. Kathy is still traumatized by the attack of a burglar in their former home. They are welcomed by their next door neighbor Caleb Theroux that befriends the family and Kathy becomes close to the divorced Brianna Fine. Meanwhile detective Porter finds a lead to the killer of Cindy.