A lethal game of cat and mouse ensues as Suitengu and Saiga hunt each other down, searching for clues and interrogating everyone they meet. When the photographer slips under Suitengu's nose to free Kagura, her captor is not pleased. He sends Shirogane to ensnare Saiga in a deadly dance under the night's sky.

Saiga and Kagura hit the road, with Ginza and Tsujido each tracking them using their own unique talents. Making a detour at a remote spa, Kagura learns some shocking truths about her own origins. But the most startling revelation is a glimpse into the human side of Shinsen. What secrets is the powerful woman hiding, and how will the past play out into their future?

With the latest assassin on the loose, Saiga convinces Ginza to drive him from his hiding place to see Dr. Ryogoku. The samples from Saiga and Kagura have been analyzed and an eccentric DNA specialist sheds new light on the Euphoria Syndrome. Meanwhile, Suitengu continues his plan to seize control -- by marrying Kagura instead.