George is seriously injured and is taken to the emergency ward. Full of anger, Kai takes out a Colt M1911 that his father was keeping secretly hidden, and goes alone after the man -or whatever it was- responsible for that hell, ignoring Riku who tries to stop him. Saya runs around town looking for her brother, when she meets Hagi. Now the young girl must take a decision. And there is no time for hesitation, because Kai is in immediate danger...

In Hanoi, Kai and Riku encounter a beautiful girl, Mui, who lost her left leg to an unexploded bomb that had detonated. In the meantime, David and his group analyze the photos of the past phantom incidents at the lycee and find out that the past victims all had black hair and Oriental complexions. They realized Saya was lured out deliberately. Meanwhile, in Naha, Okinawa, Okamura prepares to go to Vietnam on a paid holiday. Then, from the belongings left by his late photographer father, who covered the battlefields, Okamura finds a photo...

Saya and the others follow a container cargo carrying Diva who was transported out of the lycee. The operational unit of the Red Shield, Clara, Spencer, Rogers and McCoy, joins the pursuit. They go upstream on the Mekong River and head toward the experiment farm of Les Cinq Fleches Pharmaceutical. The farm had collected children from all over Vietnam. Mui, Riku and Kai were among them. But Saya and her friends are not aware of this fact as they get ready for the showdown...

Saya is invited to a birthday party for Javier, one of Glay's children. But once at the party, Saya feels that she does not belong there after all. As Kai and all others care for Saya, who has shut her mind from them, Carl closes in on Glay's residence with Corpse Corps. And his distorted love for Saya forces him to yet further insanity...