Jang Tae Joon graduated from the Korean National Police University and worked as a detective. He wanted to gain more power and decided to work in the National Assembly. Now, he is the chief aide to a 4-time lawmaker. He has excellent intuition, a cold-blooded decisiveness and a strong desire to win. He was able to place his lawmaker in the position of the party representative, but Jang Tae Joon has higher ambitions.

Meanwhile Kang Sun Young is a first year lawmaker who got elected through proportional representation and is a spokesperson for her party. She worked as a lawyer and hosted a current affairs TV program prior to becoming a lawmaker. She is ambitious and does her job well. Kang Sun Young has an awkward relationship with Jang Tae Joon, whose boss is a rival of the senior lawmaker who got her to become proportional representation lawmaker.