A royal tomb built in 2012 by a farmer who was plowing in a field in a rural village called Ssangneunggol was discovered in the past, where King Hankotnim and his queen were buried. General Tokkokdu, who was the guard of the royal tomb, loses the key to the flower that opens the door between the stone chambers and asks for help from Binsu, the son of the owner of the field. embarks on an adventure to protect the royal tomb from their hands.