The storyline is not too bad as some people have commented. Needless to say, the plot is intriguing and gripping.

Spoiler in the review:
Leaving viewers hanging with an unsatisfactory ending:
Is Song Soo Hyun really dead? If yes, where is his body? Who sent the note addressed to Ha Woo Shin? Who wants the Adamas now? Another trap for the second season? (stop it, Adamas doesn't need another season).

Ji Sung does not disappoint with his amazing performance when casted into a dual role as the two male leads, Ha Woo Shin and Song Soo Hyun. Thumbs up!!

In this drama, I love Ha Woo Shin role.

Adamas takes too much attention and brain power, so I won't rewatch it.

I hate it when the script writer decided to kill agent Kim while the psycho girl is still alive. The psycho killer should have an atrocious death.

Watch Adamas if you love unsolved mystery thriller drama.

***Unfortunately Kdramas have started following the western trend of making sequel seasons. Hate it!