While working one afternoon on the Northern Divide, a young tree-marker makes a grisly discovery: in a squatter's cabin near an old mill town, a family has been murdered. An army vet coming off a successful turn leading a task force that took down infamous biker criminals, Detective Frank Yakabuski arrives in Ragged Lake, a nearly abandoned village, to solve the family's murder. But no one is willing to talk. With a winter storm coming, Yakabuski sequesters the locals in a fishing lodge as he investigates the area with his two junior officers.

A small family-run lumber company should not have more than 200,000,000 unaccountable dollars on their books. Money like that comes from moving something other than wood across the border. The first agent the FBI sent undercover was their best man—sure to get the answers that were needed. He was dead within a month. Now, Danny Barrett is taking his place. Before he was a cop, Danny grew up in the woods of Northern Michigan. He is the only chance the feds have of getting answers, but how many more will have to die first?

By age twenty-four, Letty Davenport has seen more action and uncovered more secrets than many law enforcement professionals. Now a recent Stanford grad with a master’s in economics, she’s restless and bored in a desk job for U.S. Senator Colles. Letty’s ready to quit, but her skills have impressed Colles, and he offers her a carrot: feet-on-the-ground investigative work, in conjunction with the Department of Homeland Security.

Max Rupert has left his position as a Minneapolis homicide detective to live in solitude. Mourning the tragic death of his wife, he's also racked by guilt—he alone knows what happened to her killer. But then the former local sheriff, Lyle Voight, arrives with a desperate plea: Lyle’s daughter Sandy and his six-year-old grandson Pip have disappeared. Lyle’s certain Sandy's ex-husband Reed is behind it, but the new sheriff is refusing to investigate. When Max reluctantly looks into their disappearance, he too becomes convinced something has gone very wrong.

For maverick LAPD homicide detective Harry Bosch, the body in the drainpipe at Mulholland Dam is more than another anonymous statistic. This one is personal...because the murdered man was a fellow Vietnam "tunnel rat" who had fought side by side with him in a hellish underground war. Now Bosch is about to relive the horror of Nam. From a dangerous maze of blind alleys to a daring criminal heist beneath the city, his survival instincts will once again be tested to their limit.