In the Dajing Dynasty, on the night of the Lantern Festival, the royal family and nobles gathered at the "Qingque Terrace" in the palace to enjoy the lanterns. However, Shen Qinglan, the legitimate daughter of the Duke of Zhenguo, disappeared mysteriously in the plum forest beside the terrace. Shen Qinglan was the "Princess Hui'an" personally named by His Majesty. She was smart and astute. She had just made an engagement with the son of the Minister of Civil Affairs three days ago. Her disappearance was like a huge stone thrown into the quiet court - only a broken green bird jade pendant (a keepsake of the Shen family) was left at the scene. There was a series of messy footprints on the snow in the plum forest, but the end suddenly disappeared, as if wiped out by the wind and snow.
Shen Qinglan's twin sister Shen Qingwu (she was raised in a separate hospital due to her frailty since childhood, and few people knew of her existence). In order to find her sister, she had to sneak into the Duke's mansion and the palace as "Shen Qinglan". Carrying her sister's name, she dealt with the complicated family relationships and the "fiancé" she had never met while secretly pursuing clues, only to discover that her sister's disappearance was no accident. It involved an old case that was deliberately covered up three years ago, and the seemingly harmless people around her may have secrets.
