Retired Green Beret John Tyler finally built the life he wanted. But his past casts a long shadow. Eight years out of the Army, Tyler lives with his teenaged daughter, PTSD, and an inability to walk away from trouble. The Mechanic: The life Tyler built for himself and Lexi comes crashing down. Tyler's former commander is out of prison and hellbent on revenge. When their mutual hatred boils over, no one is safe. To deal with this threat, Tyler must use the deadly skills he thought he left behind. Can Tyler stop a monster without becoming one himself? White Lines: A brutal cartel started the fight. John Tyler will finish it. After a young car enthusiast gets murdered, Tyler looks into it when the police don't. His quest puts him squarely in the sights of a drug cartel looking to expand their operations. His mission will take him far out of state and put him directly in the path of the group's most sinister killers. How far will Tyler go to stop the shadowy group, and what price will he -- and those close to him -- pay?