Christmas Eve at the Cortesia Hotel in Tokyo was supposed to be a grand ceremony with bright neon lights, but instead it became a shura field of final judgment. Three serial murder cases followed one after another, and the deceased were all "fish that slipped through the net" who had been charged with serious crimes but escaped punishment through legal loopholes - perpetrators of violence to the deceased, robbers and murderers, and perpetrators who indirectly forced the girl to death. All of them met their belated punishment in silence. Police detective Kosuke Nitta once again went undercover in a hotel to trace the common past of the deceased, but found that all the clues pointed to a group of victims' relatives who harbored hatred. They were lurking in disguise and working step by step, but each of them had a perfect alibi. When the secrets of the "Shadow Society" surface and when the ex-convicts disguised as survivors reveal their true identities, this masked game in the name of revenge finally reaches its ultimate showdown.
