In 17th-century France, a skilled swordsman finds himself entangled in a web of betrayal and intrigue when he is tasked with protecting a mysterious countess. As he navigates the treacherous world of court politics and personal vendettas, he must rely on his wit and swordsmanship to uncover hidden truths and protect those he holds dear. With danger lurking at every corner, he must stay alert and trust no one as he fights to uncover the secrets that threaten to unravel his world. "On Guard" is a thrilling tale of honor, deception, and redemption that will keep viewers on the edge of their seats until the very end.