The Reckoning System descends, and Earth will be erased in a hundred days. Ordinary man Ethan draws a shabby Fire Lookout shelter that holds only three people. His lover abandons him for the wealthy Grant who owns a golden stronghold, while only Brooke chooses to stay. In desperation, Ethan awakens the myth‑ranked Midas Protocol, which can randomly evolve territory structures. He fuses crossbows, altars and flight modules into his ramshackle tower. Together with undead warrior Mara, he faces Riftborn hordes, the Long Night disaster and Grant’s greed. Fighting hard in the doomsday, Ethan builds the run‑down tower into Skyhaven, a floating homeland sheltering numerous survivors.