A group of firefighters in Hong Kong, led by the experienced Sam, faces their toughest challenge on Christmas Eve when a fire breaks out at a power plant. The plant's fuel tank is dangerously close to exploding, which could plunge Hong Kong into darkness. Meanwhile, Sam's colleague Chill is struggling with his own demons and has been reprimanded for his brash behavior on the job. Their team, including the newbie Ocean, must overcome personal and professional obstacles to contain the fire and prevent the catastrophe. The situation is further complicated when they discover that the fire was started by an illegal activity within the plant, adding a layer of urgency and danger to their mission.

As the night wears on, the firefighters must navigate through intensifying flames and collapsing structures, all while maintaining their resolve to save as many lives as possible. Their courage and unity are put to the ultimate test as they work together to avert the crisis. Facing near-impossible odds, each member of the team must make critical decisions that not only affect their own survival but also that of countless others who depend on them. Amidst the chaos, they find strength in their camaraderie, understanding that their actions have far-reaching consequences.