Believing Junyan and Yuyang are in a relationship, Haifeng drinks in misery. Junyan tries to comfort him, but Haifeng hits him and flings alcohol at his face. Suddenly, Junyan loses his hearing. Yuyang is upset Haifeng has injured Junyan. However, Junyan reveals his long-standing hearing problem and says he had learnt to lip read just in case his condition worsened. Xie Meigui hires CCI to look for her son, Xie Qicong, who has been missing for 10 years. Qingxiong is clearly uneasy in her presence. Suspicious when Meigui decides to abandon the search, Yuyang and Junyan call on the father of the girl who went missing with Qicong. Wu Hanwen firmly states that he still has hope of finding his daughter, Meiwei. Yuyang is authorised by Hanwen to retrieve the case files from Rongtao. She asks Rongtao not to inform Qingxiong. It turns out that Qicong was under the care of a nanny. Meiwei’s biological mother, Zhao Caixia, who was Hanwen’s ex-wife, works at Xiulian’s dance school. To find some clues, Junyan and Yuyang go to the primary school Qicong and Meiwei had attended before they disappeared. Xiao Dong (Aloysius Pang), the autistic child of the janitor, reveals the missing children were abducted by aliens and gives them some drawings. Qicong’s former nanny cannot be found. Her neighbour discloses that Qicong’s parents hardly visited him. Qicong hated his father. Thinking he is being followed, Junyan’s stepfather, Jiaqiang, has a dispute with a man and injures him. He is afraid the man will press charges against him, and asks Junyan to join him at the hospital. The injured man happens to be Haifeng, who claims he was drunk and unaware of what happened. The janitor informs Junyan and Yuyang that Xiao Dong has been drawing the same picture day and night since meeting them. Yuyang feels a sense of familiarity about the man in the picture. When Xiao Dong hums a tune and bends down to tie his shoelaces, something dawns on her.
