The Sweet Melon Romance tells the story of Tang Tang, a commoner girl summoned to the imperial palace after growing a special variety of sweet melon, where she accidentally gets caught up in court intrigue. Her talent for growing melons wins the emperor’s favor, and she becomes everyone’s darling. At the same time, she uncovers a plot to poison Crown Prince Zhou Chengjin, who has been drugged for a long time. Tang Tang uses her knowledge of the medicinal properties of melons and fruit to treat the crown prince, earning the enmity of the Second Prince’s faction. When the emperor is poisoned too, Tang Tang risks her life to save him, only to be framed and thrown into prison. In the end, she grows melon seedlings that can cure the poison and helps the crown prince expose the truth. Tang Tang rises from a melon farmer’s daughter to become the wise and gracious Princess Huixin. She and the crown prince fall in love, and she becomes a wise empress who uses her intelligence and kindness to benefit the people.