Starting from a 40-year-old man and a 20-year-old woman who share the same heavy living burden and their families and friends, the play shows how they observe and heal each other....

Fifteen years ago, a young girl was kidnapped on the way from school. At that time, Park Hae Yeong, who was an elementary school student, witnessed the girl being taken away. A few days later, the girl was found dead, and detectives couldn't find the culprit. Fifteen years later, Hae Yeong is a police officer and criminal profiler. One day, he finds a walkie-talkie that allows him to get in contact with Detective Lee Jae Han who is in the past…...

This a Drama series about a group of co-workers in their twenties who started their job at a big multinational company. This is a story about their everyday life, about their journey each day at the office....