The young Chen Shi becomes a horse-riding slave in a marquis's manor and, through a twist of fate, is drawn into the household's internal conflicts. Forced to navigate schemes from every side, he unexpectedly obtains a peculiar stance-training technique and diligently cultivates martial arts through sheer willpower. He also learns a special form of medicine. In the strictly hierarchical marquis's manor, his masters above threaten and exploit him, while his fellow servants below undermine and harass him. Treading carefully at every step, he seeks a chance to escape his slave status while forging alliances with useful allies. Trapped in the narrow gaps between conspiracies, he struggles to survive and strives to take control of his own fate and that of those around him.