FBI agent Collin Sullivan arrives at Broken Chains Ranch with Ollie Callahan—a foster teen and sole witness to a mob hit. The ranch, started by Collin's cousin to provide a trauma recovery facility for veterans, should be a place he can keep Ollie safe until the trial. But what was meant as a peaceful haven becomes a battleground when armed attackers surround the property. Survival expert Elena Thompson teaches wilderness skills at the ranch and coaches Ollie in self-defense, but soon the series of attacks on the ranch escalates into a full siege. The question is, Who are the attackers after? Ollie, the young witness? Or Elena, with her mysterious past? Cut off from help by tech skills superior to their own, Collin and Elena fight to keep everyone alive as secrets and danger close in. USA Today bestselling author Lynette Eason presents an action-packed start to a new series with twists and turns readers will never see coming.