A seven-year-old child prodigy hides distress signals in her drawings, while her wealthy father ventures deep into the mountains to search for his missing wife and daughter. Seven years ago, the wife of genius painter Gu Yanchuan, Su Wanning, disappeared in a mountain valley. He put down his brush for seven years and devoted everything to finding her. Seven years later, a child's drawing from the remote mountains falls into his hands. The symbol of a half-moon embracing two mountains is a secret signal understood only by him and his wife. The child behind the drawing is Xiaoman, his own daughter. The father searches for his family by interpreting her drawings, while the daughter sends messages through her art. After seven years apart, their determination to find each other finally brings the family of three together again in the light, and everyone responsible for the wrongdoing receives justice through the law.