A teenager’s growth. Youth often accompanies the joy and pain of growth, along with failure and setbacks. Growth is not necessarily quiet, peaceful, and compromising. Despite the twists and turns, they are all the price that must be paid for growth. Xu Lin, an ordinary teenager, after undergoing a physical mutation, how will he choose his life? Who is the most important person on his path of growth? Who is just a passerby in his life?