Agnès, Juliette and Carmen's neighbour, writes children's storybooks that take place in a fantasy world, The Kingdom of the Winds. The intrepid sisters discover a passageway between their world and this extraordinary universe. Once on the other side, the girls take on the appearance of cats and discover Sirocco, a terrifying character who can control the wind.

Bristle is a little girl raised by dragons, but when her father, Dragon, has to pay the Sorcerog using his second most valuable asset, he offers her Bristle – throwing her into an infinite sadness and forcing her to flee the family cave. Bristle then embarks on a journey to discover the world of men.