Modern military doctor Song Yaoyao accidentally time-travels and becomes the daughter of a Vice-Minister in the Tianfeng Kingdom, simultaneously binding with the melon-eating system Guagua. Possessing a bizarre ability, all her inner thoughts can be heard by all the civil and military officials in the court. Originally wanting to keep a low profile and peacefully eat melons, she repeatedly has her inner secrets exposed due to unintentional thoughts, uncovering hidden murderous intents and official secrets within the palace. Relying on her modern mindset and system assistance, she investigates multiple old unsolved cases, accurately uncovers the restoration plot of the former dynasty's remnants, achieves great merits, wins the deep trust of the emperor, and is exceptionally appointed as an Imperial Diarist. Since then, she attends court and listens to politics every day, her inner voice comparable to a live broadcast, continuously exposing heavy court secrets, stirring up the imperial court and public sentiment, and successfully completing a counterattack.