Beneath the city, different ethnic groups coexist secretly. The Wu clan set up a conspiracy, and the infant human-dragon hybrid little milk baby was fortunately preserved, being entrusted to the mid-level villa of Ye Ting, the chief of the Cat clan. Five cat clan brothers with distinct personalities cherish her deeply, guarding her together, treating the little princess as the family's supreme treasure. The soft and cute baby possesses the power of a dragon, and her special bloodline attracts the covetousness of the Wu clan. As crisis gradually approaches, the brothers protect her side by side, and the little milk baby also slowly awakens her power, writing the legend belonging to the dragon clan's little princess amidst warmth and danger.