Korean Drama '' Kairos '' is a time travel thriller.

The drama managed to pull off a difficult plot without overcomplicating things, even though it was easy to confuse the audience with the back-and-forth and the overlapping timelines. Yet, the drama used the mystery behind the time leaping to its advantage, making the viewer guess what is happening throughout the drama, or root for the leads to finally discover the truth.

Keeping things romance free was another excellent idea, as the story really didn't need any romantic element to be interesting and a love story would have shifted the focus from the suspenseful fantasy story to a more 'rosy' even tragic direction.

However, the story did get stuffy towards the ending and they repeated many twists.

The performances were also great by everyone in the cast and especially the main leads.

So, overall, seven out of ten.