Early summer, 1923. Major Yoshinobu Maeda arrive in Tokyo to question an actress who revived as a vampire after being crushed by a falling prop. Will he be able to communicate with the confused woman, who only recites lines from her last performance?

Maeda meets the vampires under his command for the first time, including an old classmate. Their first mission: Hunting down a vampire couple who have been attacking humans in Tokyo.

Yamagami and Kurusu reflect on their new vampiric lives as it sinks in that they are now legally dead. Meanwhile, the army brass pressure Maeda and Nakajima for results, aiming to cut funding for Code Zero.

Kurusu still struggles to use his vampire powers in combat as Code Zero investigates a series of strange deaths in the Yoshiwara red-light district.

While Maeda convalesces, officials move to disband Code Zero and replace them with a force of British vampires. With less than a month until the deadline, Code Zero tracks the barrels of Ascra to Yokohama.

Takeuchi and Suwa follow the mysterious vampire units. Meanwhile, Yamagami and Kurusu return to base, where they are surprised to find Maeda. How will each of them react as Nakajima reveals his true plan?