The Retired Killer Wants a Quiet Life summary: Yoo Ji-an, codename “Saber,” is an S-rank government assassin who has completed over 300 missions. After 20 years in the business, he finally retires to pursue a peaceful life. His first goal is simple: make money legally without killing anyone. But just as he begins his ordinary new life, mysterious incidents and a suspicious woman keep getting in his way. Can the legendary S-rank killer finally find happiness without returning to his old ways?