A story of two men: 40-something Gu Pil-Su (Kwak Do-Won) and 20-something Jung Suk (Yoon Doo-Joon).

Gu Pil-Su is a former boxer and he even won a rookie of the year award. He then worked different jobs and experienced ups and downs like working as a salesman, running an underwear store, and having credit problems. Now, he is in his 40's and runs a small bar. He is married and they have a son. He would do anything for his wife and son. He stills dreams of having success in life.

Jung Suk is extremely smart. His parents were poor and he grew up with them in a provincial city. Nevertheless, he was eventually accepted into the most prestigious university in Seoul. He believes the only to way to success is to be a founder of a start-up.