Ever wished you could rewrite your own destiny? Lee Soo-hyun gets that chance, or rather, that curse, when a freak accident catapults him from his humdrum life as a struggling actor into the half-finished world of "Betrayal Knight’s Joyful Faith." He awakens as Arendt von Eckhart, a character doomed to infamy and a swift execution for treason. But Soo-hyun isn't one to simply accept his fate. Trapped in a body with a death sentence hanging over its head, he decides to do what he does best: act. He sees Arendt's predetermined end not as a conclusion, but as an opening scene ripe for improvisation. His mission? To rewrite Arendt's story from the inside out, transforming a traitor's tale into something entirely new. This isn't just about survival; it's a masterclass in deception and reinvention. Soo-hyun must convince a kingdom steeped in rigid tradition and unwavering faith that Arendt is more than the sum of his alleged betrayals. Navigating treacherous court politics, skeptical knights, and the looming judgment of higher powers, he blurs the line between performance and reality. Can a failed actor convince an entire world of his fabricated truth? Or will the unfinished narrative of "Betrayal Knight’s Joyful Faith" claim another victim, proving that some stories are simply destined to end in tragedy? Prepare for a thrilling performance where faith is a weapon, and betrayal, an art form.