A War Named Desire.

Younger brother from HK visits older brother, who is a mid-level mobster in Thailand. He is looking to recoup money the brother took from the family when he fled HK 15 years earlier. His pesky girlfriend, refusing to stay in HK, learns the hard way that there's more to Thailand than elephant rides. The elder brother is caught up in an internal struggle within the mob. Someone is injecting drugs into their gambling operation. His search leads to a tug of war, with the brother and girlfriend caught in the middle.