Decades ago, mysterious gates materialized across the globe, unleashing catastrophic forces upon humanity—beings known as Demon Spirits. The emergence of Demon Suits and their wielders, Demon Suiters, finally granted mankind the means to fight back. The world's premier Demon Suiter, Li "God" Xiu, makes an unexpected choice: he discards his legendary status to become an unknown trial-taker, venturing through the gates to uncover what drew his closest friend into this dangerous path. But these trials transcend typical dungeon crawls—participants face Olympic-scale challenges ranging from soccer and basketball to track and field competitions, each test of skill and endurance more unpredictable than the last. As Li Xiu progresses through impossible trials, bewildered competitors can't help but question: "How is this nobody outperforming everyone?" His extraordinary performance unveils the truth behind his former dominance—and hints at secrets far deeper than anyone anticipated.