Shen Qinghe, a merchant girl, had a long-standing engagement with Gu Yanqiu, a scholar from a poor family. Gu Yanqiu became a high school graduate in one fell swoop, but he regretted the marriage because he thought Shen Qinghe was from a lowly family and wanted to show his dignity. Unexpectedly, Shen Qinghe has an exquisite mind, is best at abacus, and understands people's calculations better. Faced with her former fiancé's calculations, she no longer gave in. She used her abacus as a blade to dismantle his conspiracy step by step, vowing to turn this carefully planned "respect" into an embarrassment that Gu Yanqiu would never forget.
