Lin Buyu transmigrates into a book, becoming the Zombie King in the midst of the apocalypse. To awaken her younger brother, who has fallen into a coma in reality, she accepts a mission from the Space-Time Bureau to approach and reform Jiang Ran, the villain destined to destroy the world in the future. Feigning weakness, she infiltrates the Lan Base and secretly eliminates Jiang Ran's minions, only to discover that those "minions" had all once harmed Jiang Ran. Through battles fought side by side again and again, the cold and arrogant Jiang Ran is gradually reformed by the cute and righteous Lin Buyu. Yet, the mysteries surrounding Lin Buyu's identity also trouble Jiang Ran, and amidst recurring crises, Lin Buyu's identity steps closer and closer to exposure.