In his previous life, he was the ace of the world's top private military contractor, codenamed "Ghost", and died in a well-planned betrayal. When he opened his eyes again, he was Samuel Archibald Reynolds, a rookie trying out for Delta Force. Time, 1993. What surprised him even more was that something called the "Ghost Special Warfare System" came to life along with him. Cruel selection, hellish training, and treacherous real battlefields... With the battle memories of his past life and the super system from the future, Samuel Reynolds will step by step grow into a real "ghost" that will scare all enemies in this legendary era. Not only does he want to conquer the world's top special forces, but he also wants to find out the man behind the killing of himself in his previous life and complete a revenge that spans time and space.