Ra Hat Ro Kan

Rahas Lokan (The Hell Code) tells the story of Dan, a talented programmer, and Airin, a skilled surgeon. Their lives become intertwined with Nat, the daughter of the influential mob boss Sia Kamchon. Nat, who is Dan’s fiancée, is fiercely jealous and constantly bullies Airin to keep her away from him. They are joined by Atsanai, a former young naval officer who was framed by the Eagle Gang and unjustly imprisoned.
As the four of them investigate the Eagle Gang, they eventually uncover a shocking truth: the villainous Devil is actually Dr. Pisut. Furthermore, Dr. Pisut has created an army of "Demon Warriors" to eliminate anyone interfering with the gang’s operations.
The Devil is aided by Tepee and Chaos. Chaos is revealed to be Dr. Mark (or Dr. Maki), a physician at the medical center who became the Devil's henchman after witnessing his true power. To make matters worse, the leader of the Demon Warriors is revealed to be Jiu, Dan's own friend and subordinate.
Although the Devil is eventually defeated, the nightmare is far from over. Two members of the international Eagle Gang, Anna and Maria, arrive in Thailand with a mission to resurrect Dr. Pisut. This forces the four protagonists to reunite once more to wipe out the Eagle Gang once and for all.