Choi Sung Eok is a retired detective. He lives with his wive in an old apartment. He has financial difficulties, because he put all of his money into his son's business. Choi Sung Eok needs to work again to cover his living expenses. He takes up a job as janitor of shopping building. Due to this, he comes face to face with Park Yong Goo\. In the past, Choi Sung Eok arrested Park Yong Goo multiple times.

Kyung Woo is a former baseball player and he now works as a baseball scout. Jae Won is a promising high school baseball player.

Da Eun has lived in semi-basement apartment for 8 years. She finally passes her civil service examination and she prepares to move out.