Seventeen-year-old Riley Beckett is no stranger to prison. Her father is a convicted serial killer on death row who has always maintained that he was falsely accused. Riley has never missed a single visit with her father. She wholeheartedly believes that he is innocent. Then, a month before the execution date, Riley's world is rocked when, in an attempt to help her move on, her father secretly confesses to her that he actually did carry out the murders. He takes it back almost immediately, but she can't forget what he's told her. Determined to uncover the truth for her own sake, she discovers something that will forever change everything she's believed about the family she loves.

In the aftermath of the events that nearly killed him, Parker Chipp is trying to learn to cope better with life as a Watcher. And it seems to be working...until he wakes up in jail with a hangover and 12 hours of missing time. Darkness has somehow taken control and Parker doesn't have a clue how to stop him. He finds an unlikely ally in Jack, the mysterious guy in the motorcycle jacket who offers to help Parker master his abilities as a Watcher. But even as they practice, the darkness inside Parker is getting more and more powerful, taking over Parker’s body and doing everything he can to destroy Parker's life. When Jack reveals that there is another kind of Night Walker, known as a Taker, Parker starts to wonder if the strange things happening in Oakville are more than just a coincidence. After all, people are more than just sleepwalking. They're emptying their savings accounts with no memory of doing so, wandering into strange parts of town and disappearing, they're even killing other people--all in their sleep. If Parker wants to find out what's happening or have any hope of seeing his father again, he’ll have to defy Jack and put his own life in danger...because the more he learns about these other Night Walkers, the more certain he becomes that his life isn't the only one that could be lost.

Jack and his half-brother Parker have no time to mourn the loss of their father, Daniel Chipp. With an attack by the body-stealing Takers imminent, the pair must put aside their grief and track down the ingredients of Daniel's formula—one that will rein in the power-hungry Takers—to keep their family and friends out of danger.Their only hope lies in a puzzle their father left behind, a riddle where each brother unknowingly possesses a piece of the solution. The puzzle sets them on a deadly path, spiraling between reality and the world of dreams where nothing and no one can be trusted entirely. And when Parker finds himself deep in the fray between the Takers and the other Night Walkers, it's up to Jack to complete the formula and save his brother's life.