Saya is a Japanese vampire slayer whose next mission is in a high school on a US military base in 1960s Japan, where she poses as a student. She uses a katana/samurai sword to kill vampires.

Motoko and Batou work to try to stop a terrorist organization whose symbol is the Scylla. Meanwhile, Togusa investigates a murder of a man who possessed a prosthetic leg manufactured by the Mermaid's Leg corporation.

When the riot squad starts shooting citizens during the holiday season, the Major and her team must track down a terrorist hacker who operates under the name Fire-Starter.