The criminal mastermind known as Shiraishi, who lured young women to an establishment called "White Heaven" under the guise of an elite spa, then imprisoned and subjected them to brutal sexual training, is finally apprehended. But just as authorities move in, Shiraishi issues a chilling ultimatum via phone call: come to White Heaven if you want the hostages released. Riona Hirose, a skilled spy who had been tracking Shiraishi as her prime target, receives his message and rushes to the location armed with her signature weapon—the Black Baton—to rescue the captives. As she infiltrates the compound, the hidden truth behind the crimes begins to surface, revealing the true purpose behind the abductions and the crucial role Riona herself is destined to play.