In the bustling streets of Shanghai, Japanese photographer Oosawa Maria and her partner Mino navigate the urban landscape in search of captivating stories. Their routine takes a thrilling turn when peculiar incidents disrupt a local festival, thrusting them into a confrontation between enigmatic masked figures and a mysterious white-haired woman. Just as danger looms, Maria finds sanctuary in the form of an old acquaintance named Canaan, who intervenes to ensure her safety. However, a dark scheme involving a lethal virus unfurls, compelling Canaan to confront her own history to thwart the malevolent mastermind and safeguard her companions.