Ryan Olsen is a loving family man with a beautiful wife and an adorable five-year-old daughter named Mia. Then, tragedy strikes. Mia is murdered and the police find themselves with no leads. Shortly after, Ryan has a chance encounter with Stan Granger and becomes convinced that Stan is the killer. When the police ignore his suspicions, Ryan devotes himself to stalking and, ultimately, killing Stan… but not before he gets the truth. With the help of his childhood friend, Tyler Long, Ryan takes Stan captive in the basement of Stan's house. What he doesn't know is that Detective Ivy Hammett, the lead detective on Mia's case, is investigating something new… something that will send her on a collision course with Ryan before the night is through. And, despite Ryan's best efforts in employing psychological warfare and physical torture, Stan maintains his innocence, eventually causing Ryan to question if he truly has the right man… or if he's simply lost his mind.