After the divine doctor father and the female marshal mother suddenly "pass away", three-and-a-half-year-old Jiang Rong carries her pack of needles down the mountain to take care of her four older brothers, who all suffer from lingering illnesses. The eldest brother holds a high position, suffers from insomnia every night, and is constantly tormented by headaches; the second brother guards the border frontier, has lingering severe wounds in his lungs, and feels unwell at the slightest touch of cold wind; the third brother's old injuries affect his legs and feet, making movement quite inconvenient; the fourth brother's voice is damaged, and he rarely speaks. The little darling transforms into a tiny doctor, urging her brothers daily to rest and take their medicine on time. Who would have thought that these four seemingly frail older brothers actually hold supreme power and terrifying strength in their hands? A relaxing, joyful, and heartwarming daily life begins right here.