The story started with a fascinating premise but failed to deliver. The "Abyss" is a magical marble which gave them another chance at life with a different physical appearance but their fingerprints, DNA and the like remains the same. That's how Cha Min (Ahn Hyo Seop) proved to his mother who he was when he came back as a very good-looking man. On the other hand, Go Se Yeon ( Park Bo Young) came back with a "common face". I didn't like this a bit because I think Park Bo Young is beautiful and isn't in the category of a "common face".

Both Go Se Yeon and Cha min have been best friends for 20 years and apparently Se Yeon "liked him" once in awhile during those years of friendship. I mean Hello? It's too obvious that she started looking at him as a man only when he came back as a handsome guy. For me, this is just a shallow reason for her to finally "fall in love" with him. Of course, his character has admirable traits and an added bonus was his new easy-to-look-at face. But the sparks and chemistry just didn't happen. They do look good together and their relationship was showcased on the last 4 episodes but it wasn't convincing enough.

As for the mystery and suspense part, it was interesting enough but dragging. There was a point where I wanted to drop the show but you'll be curious enough to finish it. Lastly, I'm a big fan of Park Bo Young and it's also one of the reason why I had to finish it. Her acting's good but it's not her fault that the story fell flat at the end especially when the "Abyss" wasn't really explained fully.