Best Drama Recommendation for Newbies: [Drama Chat]

Part of being a K-drama fan means dragging others into the wonderful place we call dramaland. Now, some will be naturally curious and ready to experiment. But others will need to be forced persuaded with that one show that exemplifies all the things we love about dramas — and all the things they do so well — in one tidy 16-episode package.
 

What’s that ONE DRAMA you would recommend to someone who wants to dip their toe into the K-drama universe, and why is it your pick?