A Mutant attack on a friend's wedding in Hokkaido leads to Katsumi becoming Golgom's tool, forcing Kotaro to pursue them in order to save her from their grasp.
北海道・夕張に向かった光太郎たちを狙うゴルゴムの使者・ケラ怪人。ターゲットとなった克美がシャドームーンの意のままに光太郎を襲う。
