At the prestigious Marhawa Academy, a series of violent incidents leads the administration to secretly seek help from Professor Doug Wright, a specialist in biological threats. Accompanied by his nephew Ricky Tozawa, he quickly discovers that several students are showing disturbing mutations linked to a viral infection. While the school attempts to suppress the incident in order to protect its reputation, the situation escalates and draws the attention of the BSAA. Chris Redfield, Piers Nivans, and their allies become involved in a crisis where biological experimentation, internal secrets, and uncontrolled infection collide. The investigation gradually reveals that the Marhawa outbreak may be the sign of a far greater threat.