Detective Reed Mattox, just three months removed from the death of his partner, has turned invisibility into an art form. Switching to the K-9, taking over the graveyard shift, moving to a farmhouse miles outside of Columbus - his every move has become predicated on putting as much distance between himself and the outside world as possible. That distance is shattered, though, when bodies begin turning up in The Bottoms, the poverty-stricken section of town he is assigned to patrol.

Army veteran Mason Sharpe's world is turned upside down when his beloved fiancée is killed in a random shooting. Struggling to cope with his grief, Sharpe instinctively heads for the North Carolina town where he and his bride had planned to honeymoon. Alone on a beach, contemplating a future which now seems bleak and empty, he stares into the abyss. But then… A body washes ashore. An investigation begins and the police quickly pronounce an accidental death. But Mason isn't buying it. He believes the man was murdered and someone is trying to cover it up.

Tom Rollins has gone AWOL from his CIA black-ops unit and is living off-grid when he hears that the woman he loves, Alejandra, has been murdered by a person or persons unknown. Rollins is determined to punish her killers and sets out on his own personal search and destroy mission. Applying pressure as only he knows how, he quickly discovers who was behind the killing—a vicious gang of hardened criminals. Using his dizzying array of lethal skills, Rollins begins to take out the leaders of the gang, one by one.

When a mysterious client asks former Delta Force operator Case Lee to investigate a rebellion in South America, he uncovers an incredible global conspiracy. Welcome to revolution, murder, and behind-the-curtains intrigue. As events unfold, the spies and mercenaries come to a hard realization. You may mess with a lot on this good earth, but you don't mess with Case Lee.

Wounded in the line of duty, former K9 Handler Maddie Castle finds herself back to square one. The bullet that shredded her leg took the life of her four-legged partner. The pain of recovery goes well beyond the daily physical torment she endures.