The top-rated streamer U-san, who specializes in investigations, is trying to figure out a serial killer who targets beautiful girls in red. To understand the killer's mindset, U-san decides to recreate the scene of the last murder with another streamer, Matilda. The broadcast attracts a lot of views, but Matilda takes over, and U-san falls out of the top rankings. When Matilda goes missing, U-san sets out to find her.