Synopsis: Wi Da-In (Ha Yoon-Kyung) is an enthusiastic freelancer designer. She takes part in a project and works with Park Hyun-Woo (Lee Hak-Joo). Park Hyun-Woo is a team leader of a brand agency. Park Hyun-Woo and Wi Da-In shared a one night stand in their past. While working together, they both begin to have feelings for each other. Around this time, Wi Da-In's ex-boyfriend Jeon Jin-Seok (Jeong Jae-Kwang) begins to work with Wi Da-In and Park Hyun-Woo on the same project.