Choi Kang-Woo is a former detective, but he now works as a veteran insurance investigator. He leads a team that attempts to reveal insurance fraud cases.

University students Yoon Jin-Myung, Jung Ye-Eun, Song Ji-Won, Kang Yi-Na and Yoo Eun-Jae share a house. Jin-Myung is busy supporting herself financially and studying. She suffers from lack of sleep….

Whenever elementary school teacher Kang Joon-soo (Lee Seung-gi) falls in love, he always gives too much of himself to the relationship. Yet despite that, he ends up being the one…