Song Chunhong, the legitimate daughter of the General's Mansion, and Shen Yingchen, the second prince, met for a little while. They were classmates studying, listening to the rain and admiring flowers, and a touching and delicate relationship developed. Later, they went on an expedition together to kill the enemy and made a life-and-death oath. They are just the most ordinary lovers, but their identities and experiences make those ordinary conflicts become serious and unforgivable. When the flowers of the Midsummer Festival are gone, the relationship between the two is also fragile. I only wonder if the one who ascends the throne will be able to put a peony on her hair with his own hands.