Wildlife rangers Nick Drake and Loq take separate paths, but both lead to action, murder, and mystery in a thrilling and emotionally charged chapter in this bestselling series.

When his sister goes on the run with a charismatic Indian rights activist wanted for murder, Loq risks everything to find her. He teams up with a beautiful police officer tracking a member of her own tribe who joined the fugitive too. Danger, desire, and treachery test the pair as they follow a trail through the wilds of Oregon, Idaho, and Montana made famous a century before during a legendary and bloody flight for freedom.

Can they stay ahead of a ruthless federal agent, solve who's responsible for leaving bodies on the trail, and rescue people who don't believe they need to be saved?

Meanwhile, Nick Drake embarks on a hazardous undertaking of his own when his adopted son continues to be haunted by his traumatic childhood in war-torn Vietnam and a loved one is stricken with terminal cancer. Father and son go in search of healing and meaning, but deadly forces turn their quest into a fight for survival.