Kim Jongin is a lucky man. He's got a girlfriend who adores him, a nice house, and a cushy new job as a special forces detective.  But there's something that has been eating Jongin away for the past 10 years: the disappearance of his childhood best friend, Do Kyungsoo. 

Byun Baekhyun has spent his whole life in his little village with his beloved grandmother, and he expects to spend the rest of his life there as well.  Until a strange man shows up on his doorstep, revealing that he's the heir to a vast company and family and must immediately go to Seoul to tak