A longtime celebrity Yeo Woon Gwang suddenly has a need for a bodyguard and hires Kim Seol Woo, a man trained in special investigations. He’s described as a mysterious man of many talents, and the drama is about the twisty events they encounter and the budding bromance between the star and bodyguard.
Seo Jin Woo has the condition of hyperthymesia, which allows him to remember almost every day in perfect detail. To prove the innocence of his father, Jin Woo becomes a lawyer. He struggles to prove his father's innocence, but he begins to lose his memory due to Alzheimer’s.