Lin Sui'an, an artisan of intangible cultural heritage embroidery, and Cheng Yanzhi, burdened by his family's ancestral sins, decipher the Blood-Merged Silk Code in the mirror chamber of a century-old Xiguan mansion and among the wreckage of a red boat. Using Cantonese embroidery as their blade and time as their box, they put an end to the Cheng family's soul-swapping art, only to discover that she is the last living piece in a century-old blood game.
