Lu Ping is a nuclear safety engineer conducting the final comprehensive inspection at the world's first fifth-generation nuclear reactor, which features full independent intellectual property rights and an impressive rated power of 3000MW. The reactor is designed to be extremely safe and advanced. However, after completing the inspection, Lu Ping discovers that the entire plant has suddenly entered an emergency state, with all personnel evacuated, leaving him alone. As he prepares to leave the nuclear island, he witnesses two workers chasing and wrestling outside the restricted area. Suddenly, one worker attacks the other, biting his neck and chewing on flesh, exhibiting terrifying behavior. Realizing something is terribly wrong, Lu Ping attempts to contact security and the armed police force, but the communication equipment fails. He can only seal himself inside the nuclear island by closing the blast-proof door and wait for rescue. The entire scene is filled with tension and unknown dangers.
