Chen Du, a mute orthopedic technician, was ridiculed by the whole hospital as a waste, but he used his silent skills to turn the tide during an emergency operation, revealing a series of medical accidents that had been covered up for twenty years. Genius surgeon Lu Zhao was forced to face the truth about his father's death, while the secrets of anesthetist Colin Wanfeng, security guard Zhao Tiezhu, and equipment dealer Su Yan were intertwined. When Chen Mum's sign language diary and the burnt signature sheet were pieced together, the dark heart of the entire medical system began to collapse.
