In a world of mushers and sled dogs, a killer is hiding in plain sight.

Dr. Aris Thorne and his assistant, Mia Rodriguez, are providing veterinary care at the annual Northwood Sled Dog Race. The high-stakes competition takes a deadly turn when "Ghost," the lead dog of the favored team, is found dead. While the official report cites a tragic accident, Aris finds clues that point to something more sinister: poison. With the police swamped by the chaos of the race, it's up to Aris and Mia to solve the crime.

Their investigation pulls them into the brutal, competitive world of sled dog racing, where bitter rivalries run as deep as the snow. Suspects abound, including a ruthless musher who will stop at nothing to win, a demanding coach who pushes his dogs to their limits, and a former employee with a history of bad blood.

With Aris's deep understanding of sled dog behavior and Mia's tenacious detective work, they must decipher the silent clues from the other dogs to uncover a trail of buried secrets and expose a long-ago cheating scandal. Can they catch the killer before the race is over and the trail goes cold?