マルチアースΛ8018の宇宙刑事ギャバン、通称ギャバン・ブシドーこと刹那は、本来二つの姿を持つはずのないギャバンと融合したレイジと対峙する…
逮捕された久住ヒトシを黙らせるため、犯罪組織のボス、カラスマロは刹那とその仲間を襲撃する。次々と事件が起こり、刹那はレイジがカラスマロへの怒りに燃える姿を目撃し…！
Space Sheriff Gavan of Multi-Earth Λ8018, also known as Gavan Bushido, Setsuna, faces off against Reiji, who has fused with Gavan, even though they are not supposed to have two forms...
In order to silence the arrested Hitoshi Kusumi, criminal organization boss Karasumaro attacks Setsuna and his allies. One incident after another ensues, and Setsuna witnesses Reiji's rage towards Karasumaro...!
