Lucky, a ten-year-old prodigy healer, causes trouble for his masters due to his huge appetite. Nina brings Lucky down to the mountain and Lucky mistakes Alex for his father, who initially rejects Lucky, but is impressed by his kindness to cure him of a poisonous disease. Alex begs Nina to save Lucky from death, and together they search for medicinal herbs. At an auction, the two of them accidentally obtain the precious Pine Stone, and Lucky and Nina gain recognition as the Medical Fairy, while the growing connection between Nina and Alex hints at a long history, revealing that Lucky may be their son.