Since childhood, Ji Ran has been like a child playing like a monkey in the alleys of Beijing. He is simple and kind at heart. Regarding love, she firmly believes that a lifetime, not even a day or an hour, is a lifetime. Until she met a boy named Yang Lei, she knew that this was her life. How long can you last if you love someone? How long can you wait for someone? How will Ji Ran choose when facing the turning points of her life and facing the storm sweeping across society?