Barkeep "Kai" has but one goal - to become a legendary 'Master Bartender'. However, he has yet to make any progress in the mysterious, seemingly timeless tavern he serves at. One fateful night however, a tipsy princess stumbles through the door - making an encounter that would change his life.
He is left with little choice but to assist her throughout the labyrinth-like underground basements and dungeons that lay underneath the tavern, in order to chase after an evil wizard. Along the way, he'll learn the secrets of "liquormancy" - and the dungeon's mystical "High Proof Spirit Maidens".