Where do I start?
This drama used its potential to the fullest and is definitely under rated.
By the name only you've come across what the plot is gonna be about exactly.

The only horrible thing about this drama is the starting 2-3 episodes.
It's f slow and has zero plot development which left me frustrated and I was about to drop it .

From EP 4-20 it's really good.
The hype kicks on, every possibility is tested, and the ending is open which is one of the best things about this drama .

The acting is amazing, none of the actors disappointed me , the direction could've been better but then again they really did wonder with the budget.
Go and watch it if you're in the mood for time travel.

And yeah you can fast forward or skip the first 2-3 episodes, they're a pain in the a88 to watch.
ENJOY! I won't reveal much as anything else would be a spoiler .^^