When he finds the daughter of a woman he failed to protect from a violent husband years ago hiding out in his lakeside cottage, Duluth PD Lieutenant Jonathan Stride is driven by guilt and duty to help her.

"Attorney Gavin Webster says he paid $100,000 in ransom money to the men who kidnapped his wife. Now they've disappeared with the cash, and she's still missing. Gavin claims to be desperate to find her--but Stride discovers that the lawyer had plenty of motive to be the mastermind behind the crime. Even as Stride digs for the truth about Gavin Webster and his wife, he must also deal with a crisis in his own marriage. But all he can do is keep moving...

"On a rainy June morning, tens of thousands of people crowd into Duluth for the city's biggest annual event: the Duluth Marathon. Exhausted runners push to reach the finish line and spectators line the streets to cheer them on. Then, in a terrifying echo of the Boston bombing, there is an explosion along the race course, leaving many people dead and injured ... Within minutes, Jonathan Stride, Serena Dial, and Maggie Bei are at work with the FBI to...