Xue Ling transmigrates as a cannon-fodder substitute bride, and from the start she is held at the docks with nothing but a temporary marriage contract. She binds herself to the [Myriad Analysis] System, which lets her read the craftsmanship and hidden flaws of objects, though every use drains her energy. When Chai Xingyan, an executive of the merchant guild, forcibly detains her, she immediately challenges him over contradictory clauses in the contract's addendum, drawing the attention of contract inspector Pei Yanchi. The broker's bookkeeper, Liu Jiyin, secretly slips her a duplicate copy; old craftsman Zhong Ping turns against the guild and testifies; and arbitrator Ke Jin is forced to reopen the case. Each side's private motives collide. After Xue Ling's trump card is exposed, the merchant guild closes in on her. She has no choice but to strike a deal with Pei Yanchi, trading her analytical ability for the original, tamper-proof records. As she picks apart the shady rules of the substitute-bride industry, she also investigates the deadly connection between the System and the foundations of the world inside the book.
