Modern money-making expert Gu Xiaoman accidentally time-travels into a book, navigating with ease between the prince's estate and the imperial court using her business acumen. The cold and loyal Prince Xiao Che goes from being on guard to falling deeply in love, joining hands with her to do business and make money, investigate cases and reverse unjust verdicts. Arch-rival Murong Che sets up schemes step by step, with political plots surging in the shadows. Amidst a contest intertwined with trust and country, the two's heartbeat values quietly exceed the limit—and this grand chess game has only just placed its first piece.