Leonard Shelby is on an unrelenting quest to find the man who brutally raped and murdered his wife—a journey fueled by grief, rage, and an unyielding sense of justice. Yet, this pursuit is fraught with unimaginable challenges, for Leonard suffers from a rare and incurable form of short-term memory loss. While he can still vividly recall the minutiae of his life before the devastating accident that claimed his wife and altered his reality forever, every new moment slips through his fingers like sand. He cannot remember what happened mere minutes ago, where he’s headed, or even the purpose driving him forward. Each step in his search feels like starting anew, a fragile thread of vengeance holding together the shards of his broken existence. Despite this relentless forgetting, Leonard clings to fragments of memories, photographs, and notes scrawled on scraps of paper—tools that serve as lifelines to keep his mission alive. His struggle isn’t just against the perpetrator but also against the cruel confines of his own mind, which threaten to erase not only his purpose but the very memory of his beloved wife.