In the magical land of Camelot, the fate of the realm lies in the hands of Excalibur, a holy sword that chooses the next ruler. But this blessing carries a deadly curse: every king who wields it is doomed to die after ten years of rule. Beyond the throne, the court is a treacherous battlefield of politics and power, where alliances shift like shadows and danger lurks behind every smile.

Valentina Armstrong, reeling from a recent breakup, receives a mysterious scroll summoning her to her estranged father's estate to train as a Lady of Camelot's legendary court. Uninterested in the life of nobility, Valentina resists-until a ninja team forcibly takes her. Escaping their grasp, she stumbles into the mystical realm of Avalon, where she learns Camelot's legacy endures beyond time. Lost and searching for answers, she encounters a knight who claims to be the legendary Sir Tristan of Camelot.