Misaeng (2014)

Since he was a child, the board game baduk has been everything to Jang Geu-rae. But when he fails at achieving his dream of becoming a professional baduk player, Geu-rae must leave his isolated existence and enter the real world armed with nothing but a high school equivalency exam on his resume. Through an acquaintance's recommendation, he gets hired as an intern at One International, a large trading company. There, Geu-rae meets his boss, manager Oh Sang-shik, who's a workaholic and has a warm personality; fellow intern Ahn Young-yi, who attracts her colleagues' ire because of her impressive educational credentials and by being extremely competent at any task; and Jang Baek-gi, a geeky co-worker whose anxious nature masks his inner ambition. Geu-rae learns to navigate and adapt to corporate culture, with baduk as his guide.