Adamas Season 1

The twin brothers Woo-shin and Soo-hyun are trying to solve the mystery of a 20-year-old murder. Their biological father is accused of murdering their stepfather. To find the real culprit and exonerate their father, who is facing the death penalty, they need to find the Adamas, the murder weapon. The thing went missing the night of the murder, along with the witness' daughter.