After Xia Zining, a modern social animal, died of overwork, she was accidentally bound to the "Three Realms Eating Melon" system, and she quickly traveled to the ancient supernatural world and became a little-known Taoist nun. At the beginning, he was almost framed for stealing incense and money and beaten to death with a stick. Fortunately, the system was activated and he gained the ability to detect ghosts, people, and treasures. In order to earn enough merit points to "become an immortal", from then on, the evil ghosts in the haunted house in the eyes of others became a collection of gossip in her eyes; the ghost king who was helpless by the experts, she could see through at a glance his weaknesses and dark history. Xia Zining used a talisman in one hand and a melon in the other to catch the most vicious ghosts in the funniest way, and at the same time, she slapped the faces of the "masters", magicians, and nobles from aristocratic families who looked down on her. On the way to completing tasks and earning merit, she repeatedly encountered an "unlucky" prince, Li Yelan, who possessed dragon energy but was always haunted by ghosts. The two went from being enemies who despised each other to working together to solve crimes, fight monsters, and pacify the world of Yin and Yang. They finally revealed the shocking secret behind the system and reached the pinnacle of life.
