A man is murdered and is reborn into another world where magic exists. Shortly after birth, his mother is taken away from him. He is found and raised at the outskirts of the Silent Demon's Forest by his sickly adopted ex-adventurer grandmother, Barbra, naming him Allen. He discovers that not only magic exists, but monsters and demons exist too. He uses his newly attained knowledge and the knowledge of his past life to become strong as he vowed to be the strongest in order to protect what's dear to him. Follow him on his journey as he battles orcs, bandits and even the Demon Lord himself, with every battle continuing to build his power.