Just like a sunflower cannot live without sunshine, Xia Weinuan cannot live without Qiao Muyang. This is a parallel time and space, but they are no longer on the same level. At that time, they were 8 years old, and a little flower was the guarantee for their trust in each other. Now that they are 18 years old, the red line between each other seems to have disappeared, but fate tells them in the dark, not to leave regrets, and to be bold if they like it.