Jasper Lynn, of Lynn Clan, awakened F-rank talent but was rejected and expelled. He discovered all objects can be turned into cold weapons. He counterattacked his younger brother Hudson Lynn, joined the Supernatural Hero Corps, and partnered with weapon master Serena Hale. The Clan transformed Hudson Lynn into a half-beast monster and kidnapped Serena Hale. He defeated Hudson Lynn and exposed the Clan's crimes. Jasper Lynn was promoted to chief captain, fighting side by side with Serena Hale.