He City painter Wu Jintong left home after his marriage broke up and raised his daughter Bai Wu alone. However, he pushed her away with harshness and indifference because he was afraid that her daughter would make the same mistakes again. Bai Wu grew up in a desolate environment where his father disowned him and his mother's love was like a knife. He saved money by painting and longed to escape. On the eve of her graduation from college, she borrowed a car to go to the tidal flats, where she met Jiang Wei, a young equestrian who was suffering from a high fever - an international equestrian champion who had retreated behind the scenes. The two met briefly and then separated due to their mother's critical illness, and then reunited in Heshi. Jiang Wei's silence, determination and freedom gradually warmed Bai Wu. After her death, her mother left a letter saying frankly, "I'm afraid you will end up like me." Bai Wu finally let go. With Jiang Wei's silent protection and companionship, he walked out of despair, understood each other, and became a light in the dark night.
Concept: The whole story is shrouded in a sad and tender undertone. Almost all the characters have been hurt, but the way they get along is not to accuse or retaliate, but to light a lamp silently: Liang Pingzhi lights a lamp for Wu Jin, Wu Jin leaves a deposit and a letter for Bai Wu, Jiang Wei leads a horse and leaves a door for Bai Wu, and Liang Shizhi borrows a car and sends a bowl of porridge to Bai Wu. These small kindnesses gathered into an underground river, supporting Bai Wu's sinking life. In the end, Bai Wu and Jiang Wei became each other's lights and built a new home on the grassland.