A Royal Vault Appeared in the Backyard

Choi Min-ho, an office worker in his late twenties, has hit burnout amidst frequent overtime and the suffocating pressure of a lease loan. To leave behind his grueling, treadmill-like life in Seoul without a single regret, he scrapes together every last penny of his assets to purchase a dilapidated country house with a yard in a secluded, quiet rural village. After roughly unpacking his belongings, he clears the weeds from the yard to start a small vegetable garden and picks up a crude pickaxe. "...What on earth is this?" He has no idea why there is a royal vault here.