Song Yoonju is well-known as the first rank employee in her division. Because of her past, she always closes herself off in order to not get involved in serious relationships, both friendships, and romance. It also made her keep a distance from her colleagues. However, since the arrival of Gu Jaehee in her division, the wall that she had built was slowly collapsing. She fell in love with Gu Jaehee who had just broken up with his girlfriend. Will Song Yoonju's love story run easily?