I am honestly not a fan of Esther, but for this drama she is the perfect fit. She makes the drama fun and so does the rest of the cast, they are all doing a great job. Although the premise of the story is cliche but the exexution of the plot is done wonderfully, it is funny and interesting. I am on episode 18, there hasn't been a dull moment in the drama yet. It has amazing action sequence and VFX is just brilliantly done.

I would recommend that you give this drama a fair chance, It won't disappoint you.

Edit: I hated the ending. Loved the plot. Deducting points for the ending.