The protagonist is a young man who keeps writing an unpopular web novel to support his sick mother. However, one day, due to a mysterious contract suddenly offered to him, he is transferred into the world of his own novel, The Conqueror Hero Chronicles. He is not reincarnated as the main character, but as a side character named Attila. Struggling to survive in the harsh alternate world, Attila participates in tribal conflicts alongside his father, the Chief Munzuk, and distinguishes himself in numerous battles. Attila embarks on a journey to find clues to return to his original world, and while following the trajectory of the original story, he leads a mercenary group, challenging and winning many fierce battles. He eventually faces off against the novel's protagonist, Charles, and achieves victory, which elevates his fame. However, due to this influence, the history of the novel gradually begins to deviate from the original course. Will Attila be able to return to his original world? And where will his magnificent story ultimately lead? This is the start of a 100% satisfying alternate world battle fantasy, depicting growth alongside comrades and fierce struggles against destiny!