In the base game, there isn't a traditional linear narrative. Instead, you are placed in the land of , a fictional continent torn apart by six warring factions.
The file you are referring to is likely an all-in-one package for , which includes all official downloadable content (DLC). Included Official DLCs File: Mount.Blade.Warband.v1.174.Inclu.ALL.DLC....
: The story is "player-driven," meaning your choices—such as who you marry, which lords you betray, and how you manage your fiefs—determine your character's legacy. Technical Context (v1.174) In the base game, there isn't a traditional linear narrative
This specific version (1.174) is typically bundled with the following expansions: In the base game