Shen Nian'an's childhood was like the lingering fragrance of paper in a wooden house in the mountains - Chen Jiuye held her hand and taught her how to make a soul-inducing lamp. When the paper fringe shook, it always attracted a "shadow" that spoke softly. She was born with the ability to sense spirits. Master Jiu said this was her "talent to protect people," but she always sighed at the old wooden box at night: "The mountains can't protect you forever."
The night of heavy rain became a watershed. Master Jiu coughed up blood and passed away while teaching her how to tie the last "soul-protecting paper figurine". He left only half a paper-tying manual, a wooden seal engraved with the word "Chen", and an unfinished instruction: "Look for Lu Chen, Su Yu..."
Carrying Master Jiu's relics and walking into the city, Nian An bumps into the protective circle of two men: Lu Chen, the former criminal investigation team leader, carries a criminal investigation manual to investigate cases, and says he dislikes "supernatural nonsense", but secretly dumps the boiled porridge and re-cooks it; Su Yu, a psychic agent who can communicate with spirits but is often temporarily blind, smiles and says, "I will help you ask for news about Master Jiu," and always holds the corner of her clothes when she is blind.
Since then, her paper-tying skills have become "the key to regrets": paper butterflies lead the spirit of a domestically violent mother to find her daughter hidden in the scrapyard, paper lanterns illuminate the hiding place of expired food in supermarkets, and paper people convey the wish of "waiting for their son to come home" to empty-nesters. But the shadow is also approaching - Gu Mingyuan, who is wearing a copper ring, collects grievances to resurrect his wife, and Nian'an is the "spirit container" he has been looking for for ten years.
From the crybaby hiding in the mountains to the "little gentleman" holding a paper knife to protect people, Nian'an gradually understood Jiu Ye's words: "Paper-tying is not a craft, but a heart to protect people. The regrets in this world should not be filled with tears alone."