When USC medical student Ally (Candice Daly, ZOMBIE 4: AFTER DEATH) receives news that here estranged globetrotting, pleasure-seeking mother Amanda (Maud Adams, THE GIRL IN BLUE) drowned in Rio on her honeymoon with latest husband Karl (William Berger, THE SINISTER EYES OF DOCTOR ORLOFF), she jets off to Rio for the funeral. No sooner does she discover that her mother was actually murdered than she is nearly killed when gunmen lead by assassin El Pasado (Eduardo Conde, THE EMERALD FOREST) and learns from hunky rescuer Tonio (Rômulo Arantes, BLAME IT ON RIO) that Amanda was a Nazi hunter who married Karl in order to track down his elusive war criminal uncle Martin Hoffmann (Stewart Granger, THE SECRET INVASION) who has developed a formula from the venom of rare tiny South American spiders that can take away the will of its victims. Time is running out as he and partners Johann (Herb Andress, BEWARE OF THE HOLY WHORE) and Heinrich (George Lazenby, WHO SAW HER DIE?) are planning to test it out on a large scale on the "insignificant city" of Los Angeles. Together with badass partner Nelia (Nelia J. Cozza) and river guide "Kong" (Russ McCubbin, HIGH PLAINS DRIFTER) brave El Pasado's men along the Amazon and in the jungle in search of Hoffmann's legendary fortress known as "Green Hell" to crash a party of Nazis gathered for a demo of his plot for world domination. Nowhere near as sleazy or unintentionally funny as director Ernst R. von Theumer's previous WOMEN IN PRISON trilogy CHAINED HEAT, RED HEAT, and JUNGLE WARRIORS (the latter with which it may have the most in common), HELL HUNTERS seems a considerably tamer effort despite some T&A, a lot of violence, and a Nazi plot for world domination. Daly and Arantes try for some ROMANCING THE STONE-esque adversarial banter and a fleshy yet awkward waterfall sex scene. While Adams makes an early exit despite top billing and Lazenby passes through scenes with disinterest, Granger at least gives a committed performance even when the script requires him to be ridiculously naive.