Shadow Rides on Yin and Yang

The Cheng family's shadow puppetry performs for the living during the day and fulfills the wishes of the dead at night. Cheng Weijie, the 25-year-old class leader, adheres to three ancestral precepts: never look back after the show is over, never count shadow puppets, and never face north through the shadow puppet window. But after a wish-fulfilling scene, a fourteenth shadow puppet appeared in the shadow box, and he also found that his shadow was getting shorter. After being recruited into the Folklore Affairs Investigation Bureau, Cheng Weijie, armed with a dark eye and a box of shadow puppets, began to investigate strange things that could not be explained by science: shadows that turned around for their owners, masks that borrowed the faces of living people to perform operas, and old rolls that still had names after being sealed. Every time he sings a dark drama for the deceased, he is one step closer to the truth, and his shadow is an inch smaller. None of the ten generation leaders of the Cheng family died peacefully. Why did the white-haired Bai Yan guard the Cheng family for a hundred years? Who are the scratched-out names in "The Movie Book" collecting debts from? The old shadow contract is tightened again, and Cheng Weidai must find out before his shadow is exhausted: what exactly does the Cheng family owe, and who should he give his life back to?