He, Lin Mu, grew up with his elder sister Lin Chao, who was born deaf. He is the "little sun" that illuminates the people around him. He, Lu Rong, lost his parents since childhood. He was tall and handsome, and lived with his grandmother who had Alzheimer's disease. He was forced to grow up at an age that should have been ignorant. "Kunqian", an institution that provides learning opportunities for special groups. Here they meet. One is silent, the other is affectionate. Among the classmates of a group of deaf, blind, cerebral palsy patients, they opened a chapter of their youth. "Lu Rong, don't guard me like a thief. I have a sister, I understand." "Well."