Top veteran Wang Lin Hanyuan went down to investigate the old case of family extermination, and was entrusted with a high salary to serve as the personal bodyguard of female president Su Yunshu. The genetic medicine developed by Su Yunshu can treat Alzheimer's disease, attracting all the wealthy villains to snatch it. With his top martial arts skills, Lin Hanyuan successively defused various assassination traps, met a group of reliable partners, and gradually uncovered the real culprit behind the scenes. The guardian medicine was successfully released and cured many sick elderly people.
