I'm the author of a period romance novel. My love-struck best friend transmigrates into my book, where a scumbag male lead and a vicious mistress torment her to the brink of despair as the plot spirals out of control. Furious, I enter the book myself, tear the scumbag and his wicked lover apart as their creator, and use the rules of the story to help my best friend be reborn. Along the way, I turn the tables on our enemies, exact revenge, help my best friend escape her misery, wake up to reality, and build a career of her own. I also unexpectedly win the wholehearted love of Song Wenxuan, a supporting character in the book. Knowing full well that I'm an outsider from another world, he still crosses time and risks losing his memories to come find me in reality. In the end, my best friend becomes clear-minded and independent, while I finally meet the leading man destined for me. Together, we write our own happy ending amid the warmth and bustle of everyday life.