Synopsis: When Xu Qingan was young, his mother divorced his father who had cancer. After his father passed away, he lived with his mother. He returned to his hometown because of his hometown to take the college entrance examination and chose his brother's school. However, he had a different resentment for his mother and sister who left him and left. He felt guilty. When the relationship improved slightly, his grandmother suddenly passed away and his brother Shen Qingyang enlisted in the army in the second year of high school for no reason. The two also broke off contact, and later fell in love with Zhang Mubei, but they gradually developed a rift and "cheated" on the Internet. After Zhang Mubei's first girlfriend returned to China, a secret that had been buried for many years slowly emerged in front of everyone. The irrepressible love, whether it was taboo or beautiful, was entangled in everyone because of this secret. After many years, can they keep it together until the moon comes out?