They make the perfect team until a killer targets them both.

Rancher Dunne Thompson spent his adult life trying to atone for his serial killer grandfather. When his friend’s mysterious twin, Quinn Peterson, offers her help with his latest obsession — tracking down a copycat killer — it’s a non-starter. But Quinn’s quick, unorthodox mind catches patterns Dunne hasn’t seen. As attraction and danger collide, the clues lead to a suspect more surprising than Quinn herself...