Twin brothers Ha Woosin (Jisung) and Song Suhyeon's world shattered after their beloved step-father was murdered, 22 years ago.
Trauma had turned one of them into a mystery novelist and another into a prosecutor.
Past comes knocking at their doors again, as they learn the shocking reality of their biological father having been framed falsely for the murder.
The two brothers decide to use their collective skillset, expose the truth, and find the real criminal.
They must also track down "adamas" — a blood-covered diamond arrow that is the key to unravelling the entire conspiracy.
Adamas TV Series Cast, Episodes, Release Date, Trailer and Ratings