Goki Zenjo walks back into the life he survived, working for the same organization under a new king, carrying the weight of 700,000 dead and the man he failed to save. The Kagutsu Incident isn't a plot point he's moved past, it's the reason he still exists at all, and that guilt lives in every frame. This isn't a revenge story or a redemption arc; it's what happens when you have to keep working for a system that didn't save the people who mattered most.

More than ten years ago, a battle between the Red King Genji Kagutsu and the Blue King Jin Habari caused the Kagutsu Incident, a disaster that destroyed part of eastern Japan and killed over 700,000 people, both kings among them. Goki Zenjo, who survived it as Habari's right-hand man, now works again for SCEPTER 4 under its new Blue King, Reisi Munakata, though he still finds it hard to accept Munakata as his king. Then Munakata asks Zenjo to personally train a new recruit, Takeru Kusuhara, saying that what Zenjo teaches will matter greatly to SCEPTER 4's future. The film is a supernatural action story set in the world of K.