“Free Man” tells the story of the international rescue and search and rescue team ‘Free Men’, which consists of Chinese people, who are involved in rescue. After a mission, the team receives a new commission. Through investigation, Hua Zi, a member of the team, realizes that the mission may be dangerous and disagrees with it, but Luo Fengfeng, the captain of the team, believes that rescuing in the limit, creating possibilities in the impossibility, and doing one's best to save each and every life is the original purpose of the team's establishment. With this belief, a few people embarked on a life-fighting rescue. In this rescue, everyone is striving for life, not giving up on themselves and anyone who needs them. The search and rescue team enters the base underneath and encounters many attacks by mutated monsters.