Doomsday: Maintenance Engineers

After the apocalyptic nuclear winter, humans were forced to hide in dungeons. Wei Haoran, a senior maintenance engineer, shoulders the arduous mission of traveling to various underground cities with the new humanoid security robot RT15 to solve maintenance problems.On their journey, they traversed the ruins of cities contaminated by nuclear radiation, braved the cold climate, and faced unpredictable dangers. Despite going through countless hardships, they still adhere to the belief of fighting for the continuation of human civilization.