Qin Tian, the bottom-ranked student at the Beast Taming Academy, is the weakest F-rank skeleton beast tamer in the entire school. When pushed to the brink of despair, he binds himself to the Myriad Worlds Deployment System. While others cultivate for just one day, his skeletons have already spent a year fighting in another world. From a worthless nobody whom everyone could trample on, his skeletons devour and evolve, crushing opponents of the same rank as he stages one comeback after another and humiliates his former tormentors. Ultimately, they evolve into the Netherworld Emperor, overwhelming all existence.