Cute toddler Suisui has studied medical arts at Ghost Valley since childhood, and descended the mountain to search for her family in accordance with instructions. When stranded in the capital, she was helped by the youth Lu Xiao, and brought back to the impoverished branch household of the Marquis's Mansion. Suisui recognized Lu Beichen as her own biological uncle, and her background was uncovered along with it. Her eldest cousin was suffering from an ailment and urgently needed rare medicinal herbs, so Suisui bravely barged into the Ninth Prince's Mansion to request the miraculous medicine, meeting and getting to know the Ninth Prince. Relying on her medical arts to care for her family, she step by step explored the past of her mother's disappearance, harvesting precious familial affection and a sense of belonging in the mortal world.