In 18th century France, the Chevalier de Fronsac and his native American friend Mani are sent by the King to the Gevaudan province to investigate the killings of hundreds by a mysterious beast.

Sherlock Holmes (Jeremy Brett) devises a cunning plan to snare a ruthless blackmailer who’s been causing misery throughout London. And this time, even his loyal sidekick Dr. Watson finds the Baker Street sleuth’s campaign a little strange. Based on Arthur Conan Doyle’s characters, this film features a softened version of Holmes who — zounds! — falls in love.

The tyrant Gedren seeks the total power in a world of barbarism. She raids the city Hablac and kills the keeper of a talisman that gives her great power. Red Sonja, sister of the keeper, sets out with her magic sword to overthrow Gedren.