Kael Hunter or 'Hunter' is the infamous hitman who is mercilessly killed after falling victim to an enemy’s ploy. Life gives him a second chance and he returns to his rookie days. But what happens when he is granted a system that wants to make him the best hitman in the world? Will he follow the system to reach the ultimate top, or will he ignore it?

At the same time, an anonymous client reaches out to him and offers an indefinite contract. His task is to kill the person the client orders him to without questions in return for a hefty amount.

Things take a deadly turn when the client and the system both want Kael to kill the same person whose death will lead to an international crisis, and even possibly, a war. Now, will Kael kill the man, or will he decline to do the task?

Who is this anonymous client who is watching his every move silently? Will Kael find the person behind this, or will he end up following their orders until the end?
What is this system that knows everything about him and uses it to its advantage?
Join the system in its deadly game which Kael has no idea about.