Twenty years ago, an operation causes pediatric trainees Fong Chung-yan and Hui Kam-fung to become foes. Now Chung-yan is a consultant pediatric surgeon at a top hospital. He and Kam-fung, who is employed by a second-tier hospital, meet up again due to a liver transplant operation. Chung-yan coaxes Kam-fung into joining his elite team. He even invites cardio-thoracic surgeon Cheung Yee-sum and Chief of Service, Surgery Mak Hoi-kei to pave the way for building a pediatrics center. Chung-yan and Kam-fung also gradually put their differences aside as they repeatedly play certain roles in touching and sometimes tragic stories about sick children. Meanwhile, pediatric surgeon Man Pak-hei and anesthesia trainee Lin Cheuk-ying find out that particular operation performed all those years ago was associated with some medical blunder. They wonder whether they should reveal the truth.

Since losing his eyesight in an accident, Man Sun-Hop has been continually harassed and despised. But instead, his determination and perseverance are so reinforced that he has qualified as a barrister. He has also developed an acute sense beyond sight which helps him to gain the status of Blind Legal Knight in the legal profession. However, nobody really knows his true character. Fortunately, Kuk Yat-Ha, his flatmate and private detective, and ChiuChing-Mui, female legal executive with mob connections, are two buddies he can always rely on. The trio are known as Three Sword Fighters who never submit to power and are always ready to seek justice for the underprivileged. Sun-Hop’s provocative style has aroused the fancy of female judge Wong Lai-Fan, who cannot control her amorous feelings for him. Expanded to a quartet, their fate encounters turbulent changes while handling challenging legal cases. Reappearance of Sun-Hop’s father and Tai Tin-Yan, fellow sister from college, further complicates the situation, which Sun-Hop may not be able to unravel with his legal mastery.