Chris is the eldest son of a prestigious noble family renowned for producing generations of master swordsmen. At the coming-of-age ceremony known as the Grace of Heaven, he receives the unexpected profession of Farmer, a perceived failure that leads to his immediate expulsion from his home. His twin brother, who is blessed with the profession of Sword God, subsequently seeks his life.

Exiled and alone, Chris flees into a dangerous forest where food is scarce. In his desperation, he discovers the hidden value of his unique skill, Poison Disable, an ability granted by his Farmer profession. This skill allows him to consume poisonous plants for sustenance and gradually convert the poison into raw power, granting him physical abilities far beyond an ordinary person. The same ability that caused his family to cast him out becomes the foundation for his survival and a path to immense strength.

The story follows Chris as he hones this unique ability in the wilderness, learning to transform lethal toxins into a source of power. His journey is framed as a revenge fantasy from the bottom of society, as he prepares to confront the family and brother who discarded him and prove that his seemingly worthless skill can elevate him to become the strongest of all.