Shen Zhaozhao, a wealthy young lady with a talent for keeping accounts, and Xiao Hechuan, a cold-faced imperial censor, are sworn enemies. On the very same day, they both fake their deaths to escape their arranged marriages. Their two coffins collide at the city gate, pairing them together in the most unexpected way, and the emperor catches them red-handed and orders them to marry. It turns out that five years ago, her father was wrongly accused and his elder brother died in battle. These two old cases were actually pieces of the same elaborate scheme. The makeshift couple can't stand the sight of each other, bickering by day and poring over accounts by night. What began with two sworn enemies carrying coffins soon turns into a journey of investigation that makes them allies who have each other's backs.