Woo Seo Ri, a violin prodigy at 17 who was about to study in Germany, got into a bus accident and fell into a coma waking up 13 years later. Mentally she is still only 17, while physically she is now 30. Due to a trauma he experienced 13 years before, Gong Woo Jin does not want to have a relationship with others. This series is about a man and a woman whose lives in their own ways essentially stopped when they were 17. Together, they use all their might to try and open the door to the happiness that they once thought had been closed to them.