Because of the brutal killing of his family, the young engineer takes revenge without waiting for the justice system. But due to carelessness, he is arrested for murdering the father of a woman he secretly loves and is sent to train as an assassin of a secret organization that eliminates evil people illegally. There was a turn of events when he realized he was being used, so he decided to withdraw and expose the organization’s evil plans with his own life and his loved one at stake. (Source: ohsweethaven)