Special forces soldier Lu Zhao is discharged after suffering a serious injury and takes a job as a security guard in a residential complex, living under an assumed name. A grandmaster of ancient martial arts admires his unyielding spirit and entrusts him with his granddaughter and the mysterious ancient text Nine Chapters of the Hidden Dragon. To restore his body and honor his promise, Lu Zhao uses modern science to analyze ancient martial arts, taking on formidable enemies from all sides with tactics and intelligence. A final showdown over order and power begins.
