In Arizona, veteran detective Miles Porter becomes obsessed with catching his goddaughter Cindys murderer; three years later he requests his retirement to dedicate himself to the case full-time. Meanwhile, in California, Richard Alden, his wife Kathy, and their son Sam move 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, who befriends them, and Kathy becomes close to divorcee Brianna Fine. Meanwhile, Detective Porter finds a clue to Cindys killer.