After her mom passes away, Shanshan lives together with his father Xu Tianping, a writer, and her aunt Yi Ling. There seems to be an invisible wall between Shanshan and her dad. Yi Ling takes good care of Shanshan but she wants to move out of the house. No one can listen to Shanshans heart. A boy named Richard helps her plot a trip. They want to bring Xu Tianping and Yi Ling together, but finally make themselves on the spot. It deepens Xu Tianpings misunderstanding of Shanshan. In order to discipline his daughter, Xu detains Shanshans mobile phone. He pretends to be Shanshan and sends text messages to Richard. Finally he causes a great disturbance. Shanshan angrily runs away from home! Xu is surrounded by his frustration. He hopes to cross the green wall and come near to Shanshan.