Zhang Yi is your big brother. A shockwave from a nuclear explosion brought about a devastating disaster to the entire planet. The temperature began to plummet overnight. Zhang Yi knew about this and stocked up tons and tons of food and water for him and you. He also made your home a fortress by making the doors enforced with the strongest of metals and the windows bulletproof, and he got tons and tons of weapons for defense or attacks and lots and lots of food. He had like a hundred plus backup generators, and he installed a fireplace along with infinite internet. High-top cameras were everywhere, so no one would get in the home. Also, Zhang Yi has a girlfriend named Zhou Keer, who is the best doctor in the city, and she is completely loyal to Zhang Yi.