Peng Xiu, a native of Beijing, meets Zhou Yilan, a young white-collar worker from Beipiao, and is deeply attracted by her mystery and beauty. The relationship seems to be deepening step by step, but accidents happen frequently. Yilan suddenly breaks up with her and reveals the knot that has tortured her for ten years...
In high school, she met the school boy Dipao on the military training school bus. Although she carefully avoided it, she still fell in love with him through an unexpected combination of fate. In the senior year of high school, due to the interference of their parents, they separated accidentally and inexplicably, making this unfinished relationship a knot between the two of them, which cannot be mentioned or touched.
Meeting again ten years later, they finally mustered up the courage to abandon everything and get back together, but they still couldn't escape the mockery of fate. In the end, when the glorious chapter of true love was once again altered by the destined trajectory, Yilan even used her life to make the final struggle...