May we be happy every year

Tang Suihuan, the female protagonist, unexpectedly transmigrates into a book, becoming a cannon fodder supporting character, the wife of the Marquis of Yong'an. The Marquis of Yong'an is a staunch supporter of the Empress Dowager, and his entire family is to be exterminated by the Regent Prince under the pretext of 'purging the court of corrupt officials' within a year. To survive, Tang Suihuan wants to divorce Su Yuheng within a year, take her dowry, and escape the political strife for the rest of her life. Tang Suihuan repeatedly goes to the palace to plead for a divorce, but each time ends in failure. On her tenth attempt to request a divorce from the Emperor, Tang Suihuan's unconventional remarks attract the attention of the Regent Prince Shen Jin, who has just returned from a campaign. After her request for a divorce fails, Tang Suihuan recklessly claims that the Emperor will be forced to abdicate within a year, which arouses Shen Jin's suspicion. In her panic, Tang Suihuan sees someone shooting arrows in the distance. Remembering that the Regent Prince in the book is assassinated upon returning to the palace, she decides to take the arrow for him, hoping he will spare her life out of gratitude. Tang Suihuan repeatedly shields the male protagonist from harm, and he has already fallen for her.

Synopsis from DramaGo.