Oosawa Maria is a Japanese photographer currently based in Shanghai, China. Together with her partner Mino, she hunts for potential newsworthy stories across the city. When strange events unfold at a local festival, Maria and Mino immediately investigate. Soon, the pair find themselves caught in a clash between unknown masked men and a mysterious white-haired woman. Just as Maria is about to be caught in the crossfire, an old friend named Canaan appears and helps her escape. However, a sinister plot involving a deadly virus soon emerges, and Canaan realizes she must confront her past if she hopes to stop the perpetrator and save her friends.