When Detective Jack Donnelly goes missing, his son rushes to piece together the remnants of his latest case, all but certain that solving the mystery behind the Boston University murders will reveal the truth behind his father's disappearance. But, despite everything he's learned from growing up with a dad on the force, he quickly realizes that there is something very off about this particular case. Harper could not have met Aiden at a worse time in his life. His father has gone missing, and now he's losing himself in the case he left behind, not to mention that there is a murderer on the loose. But as Harper gets sucked even further into the enigmatic boy's world, she'll learn that things can, in fact, get worse. As the two find themselves sucked deeper and deeper into this strange case, they stumble into a world that is much darker than they could have realized, and even closer than they could have imagined.