言情劇《我是歌手4》是由李冰冰 孫一嬌 樸鎮英為主演主要講述了:Yoon Na Na is a well-regarded bartender at XX bar. She takes pride in her work and position as the head bartender. She doesn't involve herself in other parts of XX like selecting menu items or setup of the interior. Her dream is to open her own bar. One day, the new owner of XX appears in Yoon Na Na. She is Lee Roo Mi. The two women were best friends 5 years ago, but something happened between them. Yoon Na Na became upset at Lee Roo Mi. Now, Lee Roo Mi tries to make up with Yoon Na Na, but it's not easy.