Something of a peculiar entry into the cannibal sub-genre, being part of the "Black Emanuelle" series of soft-porn films starring Laura Gemser. Which were released to cash in on (ie rip off) the success of the popular 1972 film "Emmanuelle" (note, 2 "M"'s in the proper version).
Anyway, starting off in New York (as so many of these cannibal flicks do), our main protagonist, fearless news reporter Emanuelle (Laura Gemser), is working undercover at a mental hospital. Whilst there, one of the female patients bites a chunk off one of nurses breasts. It turns out that this young girl was found lost in the South American jungle, and the very strange tattoo she is sporting appears to be the symbol of an ancient cannibal tribe that was believed extinct.
Realising there may be another big story to be had, she consults with an anthropological expert, professor Mark Lester (Gabrielle Tinti), to see about organising an expedition. And so off into the Amazon they go, taking with them a couple of friends (cue lots of soft core sexual gropings). There, they just happen to bump into explorer Donald MacKenzie (Donald O'Brien) who's on a hunting trip with his wife Maggie (Susan Scott). Who informs them that the nearby mission camp they hoped to visit has been attacked by natives and everyone in it has been massacred.
Following a few more sexual antics, the two parties decide to head out of the jungle. But unfortunately, they are then attacked by the cannibal tribe they were looking for, and this is where the sex stops and the gore starts. A few of the members are gutted and eaten, and a couple of the girls are taken back to the tribes village for ritual sacrifice. The surviving members are then left to try and work out how to rescue the captured members and head out of the jungle before they become the natives next meal.
This is really a difficult sort of movie to describe. The first half being a soft porn film, the second half being a gory exploitation pic. But then this picture was by Italian director Joe D'Amato, who is no stranger to either of these fields, and probably sought to combine these two elements. But the film can not really be described as either. I think a soft-porn adventure film sums it up best. Fans of the other cannibal films may wish to seek this one out, it is certainly highly enjoyable on a trash level in any case (but then aren't they all?).