A 16-year-old activist known only as the Chalk Girl has become one of the recognizable faces of Hong Kong's democracy movement, always seen behind a white surgical mask. The film follows her through the protests that erupted around the anniversary of the UK's handover of Hong Kong to China, tracking how a teenager writing slogans in chalk on public walls turned into a symbol picked up by international media and a target for authorities trying to identify her. Interviews and street footage capture the risk she is taking, operating anonymously in a city where organizers face arrest, and the tension between her public visibility and her insistence on staying unnamed. The film treats her less as a celebrity and more as a stand-in for a generation of young Hong Kongers pulled into a fight over the territory's political future, one chalk mark and one masked appearance at a time. It stays close to her specific story rather than widening into a general history of the movement, which is why the anonymity itself becomes the film's central subject.