Ut Lan the Guardian Demon

In the past, the head of the Ma clan performed a ritual to summon a guardian demon to protect his hidden treasures, with his young children in mind. Years later, Lan, who has just lost her father, arrives at the estate looking for work as a maid. There, she will meet Dahn, who is the current master, and following several disturbing phenomena and a series of mysterious deaths, the young woman will become the key to uncovering the secrets hidden in these lands.