Lee yuhan is one of the most skilled assassin he was named "the shadow of death". One day he recieve a mission from his boss to kill one of the richest family son keiro flare Alvin burns is one of the most greatest detective, he recieve a work to find the secret that the flare family and to find the identity of the shadow of death what Will happen when they cross path? Will Alvin found out the identity of the assassin? Will yuhan kill the detective ? or Will they work together to finish they're mission? Let's begin the story!!