Natura contro English Against Nature, also known in English as The Green Inferno and Cannibal Holocaust II, is a 1988 Italian cannibal film directed by mondo director Antonio Climati. Climati had no intention of making a sequel to Cannibal Holocaust, and the title was used by distributors of the film to cash in on the success and notoriety of the earlier film.
The film centres on a group of four friends, Jemma Demien Deseligny, Mark Merlo, Fred Merlo, and Pete Federci, who head into the Amazon jungle to find a lost professor Ricci, believed to be dead until Jemma recovered his lighter. She rounds up the three men to head into the jungle and to find the legendary Imas tribe, who possess an equally legendary treasure and with whom the professor is believed to be found.After Jemma happens upon the lighter, she immediately telephones Pete, who agrees with her plan and hires Fred and Mark to successfully steal a seaplane, in which the three men fly down to the River Amazon to meet Jemma. United, they then head to a town, Fort Angel, to hire a guide named Juan Garcia Borgese. When Garcia refuses to help, they decide to head out by themselves, but first, they need more gasoline. They find a man named Don Pedro, who runs a business that transports monkeys from the wild to zoological gardens. After Pete resuscitates a monkey for him, Don Pedro agrees to give them gasoline if they catch monkeys for him. The group heads into the jungle by canoe with guides supplied by Don Pedro, where Pete uses a trumpet to greet strangers on the river. Before they reach their destination and set camp, a small electric ray swims up a guides anus. At the campsite, the group suffer an attack by bats, before moving on to hunt monkeys. ........
Source: Wikipedia