On 9 June 2019, over one million Hong Kong citizens marched on Hong Kong island. It was the biggest protest in Hong Kong history. The series of demonstrations lasted until 2020, thousands of people got injured or arrested.

Peter Chen is the leader of his undercover medics team. He is not related to the medical field, but he is a pacifist, who avoids using violence in the protest. Every weekend, the Hong Kong streets are dyed in violence, but rescuing injured people in the protest site is Peter's own way to resist against the government with non-violence.

In a massive protest held in the main hub airport of Hong Kong, Peter rescues a severely injured protester Blaze Lai. However, Blaze is a wanted criminal who was charged with damaging property in the legislative council. The police dragnet is getting closer to Peter, and the undercover medic is under the threat. Will Peter be able to sustain his fight against the unyielding resistance of mainland China?