After suffering a tragic fire accident, Lynn was reborn with the immortal system in a sovereign world of true magic. At a young age, his new family was killed during an attack by the beast kinds. A race known as the athons who were on the path of annihilating the human race, monsters who could attain human forms. With the death of his family weighing heavily on him, Lynn embarked on the path of revenge and making the humans at the top of the food chain.