In a land transformed by a goddess's blessing, Gatepia blooms with mystical gates leading to kirakuri-filled dungeons. When Minato's father vanishes into one of these gates, his childhood friend Yutoria persuades him to take over the family's treasure-hunting business. Reluctantly stepping into the role, Minato joins forces with the priest Makoto, the soldier Akari, and the accountant Guide. Together, they navigate missions and challenges to sustain their company, unraveling the enigma of their leader's abrupt vanishing along the way.