William Arnold led a simple and unremarkable life until a fateful day when he was stabbed by a fleeing thief. In his final moments, he believed his life had come to an abrupt end, but destiny had other plans. In the afterlife, William encounters Dereus, the God of Death, who admits his mistake in allowing William’s untimely demise. As an apology, Dereus offers him a second chance—a new life in a magical world unlike anything William has ever known. With a kind and forgiving heart, William accepts this gift, hoping for a peaceful existence. However, the powers granted to him are far beyond his expectations. Gifted with the unique abilities "Infinite Void"—which empties his enemies' minds while draining their mana and life force—and "Control Heal", a skill that creates a healing zone capable of restoring health to all within it, William is thrust into a world where peace is a fleeting dream. Reincarnated in the kingdom of Nolwer, a place known for its lush medicinal plants and the vibrant blue eyes of its people, William soon discovers that the world is on the brink of chaos. Ancient evils stir from their slumber, including the demonic forces once sealed by King Georgi Illig. At the heart of this growing darkness lies Null, the Primordial Darkness, who seeks to reclaim the world and reshape it into his image. With powerful allies by his side—James Hiro, Sion Coszeu, Karto Roeland, and Riana Scarlet—William must face the rising threat of the Demon King and ultimately confront Null, the embodiment of pure destruction. But even as William battles these ancient evils, his heart yearns for a life of peace, despite knowing that his destiny is far more perilous.