In a fire a few months ago, the youngest daughter of the Feisel family, Crystal Feisel, and her fiancé Grayson Black, who were several years older than her, disappeared. A few months later, Mike and his wife Julia, who were married but had no children, picked up a little girl about eleven years old and named her Mina.
Then Mina met an eleven-year-old boy, who looked extremely strange, named Merlin Black. She came to his house as a guest, and found out that he turned out to be a young master. He attended the banquet and met many good friends.
Soon after, Mina became Merlin's assistant and helped him win the heir competition. She also met his brothers - Jack Black, Fix Black, and Arthur Black.
Can Merlin become the heir?