On the night of the full moon, in the alleys of the city, Asher Frostblade, the assassin known as the "Legendary Assassin," is gravely wounded. He has fallen into an ambush that led him into a trap. Due to the loss of blood, Asher collapses to the ground and gazes at the full moon, which curiously has a unique color: a very intense crimson red. As he closes his eyes and reflects on his life and how cruel it was, he finally dies. However, an icy sensation envelops him as he dies, as if a bucket of cold water is falling on his face and his entire body. "Where am I?" Asher opens his eyes and is met with an unfamiliar face. After watching and thinking carefully, he realizes that he has been reincarnated into a new world full of magic and many other things. He promises himself that he will become strong enough to never again experience a death like the one in his previous life and to obtain the life he has always desired.