The apostasy of Paladin Captain Lance caused the battle line to collapse and the undead to invade in large numbers. He became the biggest executioner and sinner on the mainland. However, during the trial, he disappeared from the eyes of millions of people and appeared in the desert. Lance, who originally wanted to self-exile, accepted the city lord's request to explore the truth behind the undead invasion of the desert border guard. However, he met the King of Assassination and his son Roman, and was lucky enough to be targeted by Roman as an assassination training target.
So Lance began a journey to explore the truth while struggling to cope with Roman's assassination practice.