Yim Si-wan, Lee Sung-min, Kang So-ra, Kang Ha-neul, Byun Yo-han
Since he was a toddler, Jang Geu Rae has played the board game "baduk" (a strategy game similar to chess). He loved the game and wanted to be a professional baduk player, but he was unsuccessful. He has now been thrust into the real world. He is able to begin working as an intern at Wonin International thanks to the recommendation of a friend, and he struggles to adjust to working in a firm. Meanwhile, Ahn Young Yi, a new intern, and Jang Baek Ki, another coworker, are both competent and intelligent. Their boss will be Oh Sang Sik.