Is this the one? // Rak Mai Mee Wan Tay
wrote: 400 years ago, 2 gold digging brothers, Prawet and Jit steal 117 pieces of treasures from the Immortal Dragon Cave. They both are attacked by blood-sucking bat and they are cursed to be immortal. To remove this curse, they must return all treasures they stole to the cave. Prawet wants to do it, but Jit doesn't agree with his brother. This conflict causes these 2 brothers to be enemies against each other.
Jit kills Prawet by burning him but before Prawet died, he manage to tell his son to gather all 117 pieces of the treasures to break the curse. He bite his son Traipoom (Dome Pakorn) to make him immortal so that he can find the treasures. Traipoom then becomes a vampire.
One day, Jit can kill Prawet by burning him. Traipoom, Prawet's son decides to follow his father's intention by trying to look for the lost treasures and take them back to the cave.
Many hundreds years later, Traipoom have lived his immotal life as normal people. One day, in antiques auction event, he meets Plaichat....
-found in on some random blogspot.