Captured by a trio of thieves at a Chinese port, Gwendoline (Kitaen), a courageous but naïve girl, is sold to a local casino-brothel owner, but after being rescued by Willard (Huff), a mercenary adventurer, she is reunited with her maid, Beth (Zabou), after the latter's abduction by the same thieves who had earlier kidnapped Gwendoline.

Hired to transport an illegal cargo, Willard reluctantly agrees to take both women with him after Beth, withholding information vital to his livelihood, promises to divulge it only if he becomes their guide. Gwendoline, who has come to China to capture the butterfly that eluded her father, who had staked his professional reputation as a scientist on obtaining the insect, offers Willard $2,000 to take her and Beth with him to the land of the Yik-Yak, in which the butterfly may be found.

After escaping from the cannibal tribe of Kiops, the trio find the butterfly, but as she is about to capture it, Beth is captured and Gwendoline and Willard must enter an all-women tribe's underground lair to rescue the maid. The tribe is the vestige of the city of Pikaho, a primary diamond mining centre, which was swallowed by a volcanic eruption in the 12th century. Afterwards, the entire male population perished due to a disease spread by the eruption, and Pikaho turned into an all-women society considered nothing more than a legend. To ensure the survival of Pikaho, its Queen (Bernadette Lafont) allows a victor among them to mate with any man who visits or is captured by the tribe. Aided by Beth and the Queen's henchman, D'Arcy (Jean Rougerie), Gwendoline, disguised as a Pikaho warrior, wins this right.

While Gwendoline and Willard make love before the Queen, D'Arcy activates the volcano and he, the Queen, and the citizens of Pikaho are killed as Gwendoline, Beth and Willard escape. In the process, Willard is able to capture the elusive butterfly.

The main cast

• Tawny Kitaen as Gwendoline
• Zabou Breitman as Beth
• Brent Huff as Willard
• Bernadette Lafont as the Queen
• Jean Rougerie as D'Arcy

The rest of the cast

• Roland Amstutz as Policeman Mr. Cattochet
• Stanley Kapoul as Kiop (Chief of the Native Tribe)
• Chen Chang Ching as Yuki's henchman
• Vernon Dobtcheff as Shirko
• André Julien as Tom
• Takashi Kawahara as Mao
• Kristopher Kum as Yuki
• Loi Lam Duc as Yuki's henchman
• Maurice Lamy as Yuki's henchman (Little man fighting with Willard)
• Jim Adhi Limas as Yuki's henchman
• Georges Lycan as Yuki's henchman
• Dominique Marcas as Translator
• Roger Paschy as Yuki's henchman (Muscle man fighting with Willard)
• Hua Quach as Yuki's henchman
• Just Jaeckin as Man in Sailor Hat Smoking Cigar (uncredited)
• Larry Silva as Taoto (uncredited)
• Annemieke Verdoorn as (?) (uncredited)
• Daniel Vérité as Chinese villagers (uncredited)
• Lionel Vitrant as Chinese villagers (uncredited)

An 88-minute U.S. version was released on Vestron Video January 25,1985 (Catalog Number: VA5071) (Barcode: 02848515071)

Severin Films has^[when?] re-released the 88-minute U.S. release of The Perils of Gwendoline in the Land of the Yik-Yak and has^[when?] also released a 106-minute Gwendoline: Unrated Director's Cut based on the French release.

• The Perils of Gwendoline in the Land of the Yik-Yak at IMDb  
• The Perils of Gwendoline in the Land of the Yik-Yak at Rotten Tomatoes
• Gwendoline at AllMovie
• Movie stills
• The Adventures of Sweet Gwendoline edited by J.B. Rund.(second edition, revised and enlarged) New York: Bélier Press, 1999.ISBN 0-914646-48-6