Taking lives has taken its toll. Her moral justifications have faltered. Do any of the people she has killed—some of them heinous, but all of them human—deserve to die?

Her next target is Cameron Walker, a rancher in Arizona. When she arrives at his remote desert estate to carry out her orders, she discovers that he is a kind and beautiful man. After a lengthy tour of the ranch, not only has she not killed him—she’s wondering who might want him dead.

She procrastinates, instead growing closer to Cameron. She learns that he’s passionate about wild horses and has been fighting a losing political battle to save mustangs that live on protected land near his ranch—he’s even received death threats from his opponents.

Suddenly, she’s faced with protecting the man she was sent to kill, encountering kidnappers, murderers, horse thieves, and even human traffickers along the way. Can she figure out who has hired her before they take matters into their own hands?