Byun Hyuk (Choi Si-won) is the happy-go-lucky son of Byun Kang-soo (Choi Jae-sung), the chairman of Gangsu Group of companies. Byun Woo-sung (Lee Jae-yoon), the elder son of Byun Kang-soo, is jealous of Hyuk and looks for opportunities to bring him down.
Kwon Jae-hoon (Gong Myung) is a long time friend of Byun Hyuk and is employed by Gangsu Group to cover up the follies of Hyuk. Jae-hoon's father is a loyal driver of Kang-soo and also has gone to jail because of Hyuk's mistake, which is the cause of Jae-hoon's hatred towards Hyuk.
Baek Joon (Kang So-ra) is a street-smart girl who has multiple part-time jobs and refuses to settle in a permanent job. Her father was wronged by Gangsu Group after being a loyal employee for a long time. She has a crush on Jae-hoon, who is extremely cold towards her.
Byun Hyuk accidentally meets Baek Joon in a cleaner uniform leading Joon to believe he is just an employee of Gangsu Group. Later, when Hyuk is kicked out of his house, he comes to live with Jae-hoon.
Joon forces Hyuk to take part-time jobs and in process imbues him with the confidence to fight Gangsu Group’s misconduct and oppressive policies.
With Woo-sung and Kang-soo fighting hard to bring Hyuk down, Kwon Jae-hoon, Byun Hyuk and Baek Joon unite to expose the corruption of Gangsu Group.
