Filli and the cavemen from "When Women Had Tails" are living a carefree life inside a dinosaur skeleton. But when conman Ham introduces them to the concept of currency and economics, their lives fall apart. On top of that, Filli starts to fall in love with Ham.

When Women Had Tails is a comedic fantasy film set in prehistoric times. It follows the story of a tribe of women with tails who live on a small island. A young woman is captured by a group of cavemen, and she must escape and find her way back to her tribe. Along the way, she encounters various comedic and adventurous situations.