The film begins following the British victory of the first Opium War and the seizure of Hong Kong. Although the island is largely uninhabited and the terrain unfriendly, it has a large port that both the British government and various trading companies believe will be useful for the import of merchandise to be traded on mainland China, a highly lucrative market.
John Rambo is released from prison by the government for a top-secret covert mission to the last place on Earth he'd want to return - the jungles of Vietnam.
Four successful elderly gentlemen, members of the Chowder Society, share a gruesome, 50-year-old secret. When one of Edward Wanderley's twin sons dies in a bizarre accident, the group begins to see a pattern of frightening events developing.