Got Hit, Now I'm Unstoppable

A delivery rider named Arthur Lin is hit by a car driven by Cheryl Lok, the CEO of a company that has been under attack from the Yap family. The jade pendant he wears passes an inheritance to him during the crash, and he comes out of it able to practice medicine and fight. Cheryl takes him on as her personal bodyguard. The Yap family sends assassins, and a criminal brotherhood works against her from the other side. Arthur settles most of it with his fists. The people who treated him as a courier and nothing more are still around to watch him do it. Cheryl's reasons for keeping him close are not the ones she gives. Before the accident he had no training in either medicine or martial arts.