A Man in a Woman's Body: Avenge the Cannon-Fodder Heroine

[Female-Oriented + Transmigrate into a Book + Household and Palace Intrigue] A corporate workhorse has her achievements stolen by her boss. On her way home, she falls into a deep pit dug for road repairs and ends up in a book, where she happens upon a cannon-fodder woman. When the woman is murdered, she has no choice but to take her place, live her life again, and seek revenge.