Story summary:
On the streets of Wuxi 12 years ago, a little boy named Gu Yuanjiang hugged his dog and cried bitterly because his pet dog Dachuan left him in an accident. Bai Yiqing, who saw this scene not far away, realized that because of his momentary cowardice, he not only lost his good friend Cheng Sheng, but also caused innocent people to be harmed. This accident made Gu Yuanjiang gradually close his heart and rarely talk to others, but his dialogue with Yiqing made him gradually grow into a brave person, silently protecting the most important people in his heart. After Bai Yiqing found Gu Yuanjiang, he warmed him and became a beam of light in his life that illuminated his world. He silently guarded him and kept this secret in order to prevent Gu Yuan from getting hurt again. And the friend who had no protection before - Cheng Sheng also appeared again.