Zhou Xianzong unexpectedly transmigrated into a novel, becoming the story's big villain destined for defeat by the protagonist. Luckily, he awakens a Big Villain System, gaining strength by writing a diary. He diligently writes his diary every day, receiving countless rewards. However, he discovers the plot is going haywire. Where's the female lead who's supposed to be a lovesick puppy for the male lead? Why are they all coming to me? "It's all ruined! I've completely messed up the plot!"