Modern corporate worker Su Qinghe suffers a sudden death from overnight overtime and transmigrates into a book as a cliché cannon-fodder supporting actress. The original owner, addicted to gambling, plans to sell the amnesiac and distressed future Prince of Zhenbei, Xiao Hanyuan, to a brothel in exchange for silver. To avoid a tragic death, Su Qinghe turns over a new leaf, making money to survive by selling modern delicacies like candied chestnuts and snail rice noodles, single-mindedly saving up money to run away at the first opportunity to save her life. The amnesiac Xiao Hanyuan slowly changes from full of guard to being touched by her intelligence and resilience, gradually developing romantic feelings. However, Xiao Hanyuan's true identity gradually leaks out, coupled with the lost black jade thumb ring and crises coming one after another, leaving Su Qinghe, who has given her true heart, to make a difficult choice between romantic love and a fatal disaster.