The American friends David, Craig and Andrew travel on vacation in Bangkok, Thailand, to celebrate the last bachelor days of Andrew that is going to marry his fiancée Heather. They hire the gorgeous Thai photographer Sita to sightsee Bangkok with them. A couple of days later, Andrew tells them that they must return to Los Angeles and while going to the airport, they see Sita being dragged out from a river. Once in Los Angeles, the infection on the face of the yuppie David grows and while in a meeting, he vomits on the table and the other executives. Meanwhile Craig is stabbed by a stranger in an alley near his home and is interned in the hospital with a serious infection. When Andrew and Heather go to a Thai restaurant to have dinner, an old lady gives an amulet to David for the protection of Heather. When Heather is possessed by a fiend, David calls the shaman and the woman tells him that the trio of friends has been cursed by witchcraft and only a bridge ceremony may exorcise the evil spirit. But Andrew must tell first the truth about the tragic trip to Thailand.