In the bustling streets of Shanghai, Japanese photographer Oosawa Maria and her partner Mino are always on the lookout for captivating stories. Their routine takes a thrilling turn when a local festival becomes a backdrop for mysterious happenings. Caught in a conflict between enigmatic masked figures and a peculiar white-haired woman, Maria finds herself in peril until her old acquaintance Canaan steps in to rescue her. As they delve deeper, a malevolent scheme involving a lethal virus unravels, forcing Canaan to confront her own history to thwart the mastermind and safeguard their companions.