After an abrupt end to her tour of duty, former Marine MP Brynn Callahan and her canine partner, Wilco, arrive stateside - both bearing the scars of battle. With a mix of affection and misgivings, Brynn heads back to Bone Gap, Tennessee, and the insular culture she'd escaped when she enlisted. The Irish Travellers keep to themselves in the mountains, maintainging an uneasy coexistence with the "settled" townspeople of McCreary. But when Wilco's training as a cadaver dog leads Brynn to a body in the woods, long-simmering tensions threaten to boil over. Forming a reluctant alliance with local sheriff Frank Pusser, Brynn must dig up secrets that not only will rattle her close knit clam to its core, but may forever change her perception of who she is... and put her back in the line of fire.