The end of the world is coming, and the global order has collapsed. Su Mingyuan, a former criminal profiler, accidentally inherited an ancient safe house in a deserted suburb with its own defense and planting system, and awakened the "Crime Master Database" golden finger that can analyze traces and discern lies and motives. He originally wanted to live alone, but he "picked up" Lin Xiaoman, the teahouse proprietress who appeared to be weak and elegant, but was actually a top foodie, and her elegant fiancé, who was regarded by everyone as a leader - but was actually a well-hidden villain martial arts master. Su Mingyuan used his expertise in solving crimes to solve the endless human cases in the apocalypse (murderous cases of resource competition, cult sacrifices, team ghosts, etc.), Gradually tearing apart the disguise of his fiancé, revealing his true face of pursuing power at all costs, colluding with gangsters, and betraying his companions. In the wise and courageous confrontation with the hypocritical fiancé, Su Mingyuan and Lin Xiaoman supported each other, from survival partners to emotional resonance, and finally led the survivors to establish a new order, and completed their personal growth and comeback from "taking care of themselves" to "helping everyone".