i don't know how to describe this drama but I'm really interesting with the storyline.. i don't really understand the story but the storyline make me to looking forward to another episode. the ending is too rushing.. i was like WHAT? so what really happen.. i need to rewatch again but i don't think so.. action drama is not my taste actually... i like how the romance is not really over like other cliche drama. the best of this drama is the old lady being a professional hacker.. the main cast, park minyoung and ji Chang wook acting are on another level.. chemistry is on point.. the old lady as hacker and literally all the cast are so good