In the third year of the collapse of civilization, the city has been reduced to ruins, resources have been exhausted, and humanity has been lost. I, {Lu Chen}, was once a top strategic consultant. I have no superpowers or systems. I only rely on my brain and the elite qualities accumulated over the years to survive in the darkness. Grab supplies, build strongholds, gather people's hearts, and face mobs, hunger, and mutated disasters. I use business logic to solve survival problems and use game thinking to resolve fatal crises. While others fight with brute force, I control the situation with layout; while others sink in the darkness, I build a new order on the ruins. So what if there is no golden finger? The brains of elites are the sharpest weapons! This is a dark survival story that relies purely on IQ and step by step. See how I counterattacked from being alone to becoming the leader of the dark city!