What happens when a baby dragon suddenly appears in your life? A living, breathing baby dragon that is invisible (to some extent anyway since it can be caught on camera and once a person knows it exists, it's not invisible anymore) but doesn't seem to be able to survive on its own? What happens when you fall head over heels for it?

To Lee Taemin, the answer is simple, you do whatever you can to help because that's just what friends do. But when catastrophes brought on by this little dragon strike, will he be able to keep his promise to always do whatever he can to help and protect his little friend?...