Detective Mark Lee's wallet was stolen right on his birthday... However, the thief who encroached on someone else's property couldn't slip away unnoticed. Now, in order to atone for his guilt, Donghyuck will have to do everything the guy orders. The whole situation is even more compounded by the fact that this guy imagined himself to be Donghyuck's new master and even put the boy on a real chain! Being opinionated and cocky, Donghyuck will remain fragile and enticing nevertheless, especially for an inveterate bachelor who allegedly doesn't believe in true love at all.