Just when legendary retired soldier John Raven thought he had soaked in the extreme vestiges of life, with scars to prove it, his past comes to haunt him. His ex wife, a well respected officer, confronts him with the unfortunate news that his old friend and colleague has died. In an effort to right the wrongs of the past, John Raven takes on the task of training the new recruits of the elite fighting force, Unit Invincible. As the training begins, he is approached by one of his recruits; a young man who turns out to be his unknown son. With this new, emotionally charged responsibility, John Raven is ultimately forced back into service to once again fight for his country and protect His Own Blood.