What a let-down. I am deeply disappointed by how this story unfolded. The plot seriously has the potential and the suspense of the psycho killer was definitely something that I have been eager to know because it connects to why they are time traveling. Maybe this was about grief and loss but the story went out of hand with all the twists and turns, it became too misleading. When I ended the drama, I was in disbelief of why on earth this is one of the top lists on this site. The actors actually portrayed well but it's just that the storyline has too many revisions and it just keeps on going back and forth with time, making you lose the feelings and emotions that a viewer has invested in the characters.