[1] It was written by Lenzi and his wife Olga Pehar, and the zombie makeup fx were handled by Franco Casagni.

Lenzi said in later interviews that this was one of his favorite films, but he felt it was ruined by the low budget.

Two American college students, Dick, his sister Jessica, and her English boyfriend Kevin, are traveling through Brazil on vacation when Dick, after attending a bizarre voodoo ceremony, develops strange powers.

When their jeep breaks down near a small plantation in the jungle outside Rio, the site of a former slave rebellion one hundred years ago, Dick uses his powers to raise from the dead six executed slaves, who target the college kids and the residents of the plantation to seek revenge for their deaths.

Lenzi intended Demoni 3 to be called Black Demons, and he did not like it when the film was later retitled Demoni 3 on video, because some people thought it was part of Lamberto Bava's Demons series, which it had absolutely nothing to do with.