Seo Jin-Woo possesses a rare condition called hyperthymesia, allowing him to remember almost every moment of his life with extraordinary, photographic precision. But his perfect memory becomes his greatest burden when his father, who suffers from Alzheimer’s disease, is framed for a brutal murder and sentenced to prison for a crime he did not commit. Determined to prove his father’s innocence, Jin-Woo dedicates himself to becoming a brilliant young lawyer and takes on a powerful system riddled with corruption, bribery, and carefully protected secrets. Standing between him and the truth is the real killer, a ruthless and psychotic corporate heir whose wealth and influence seem to place him beyond the reach of justice. Just as Jin-Woo closes in on the truth, he is struck by a devastating diagnosis of early-onset Alzheimer’s himself. Now, with his once-perfect memory beginning to fade, he must race against time to exonerate his father and uncover the truth before he loses the very memories that made him capable of fighting for justice.