Two people, a man and a woman, wake up naked and with their abdomens attached to each other.
Lucía, a club dancer on the run, takes refuge in a sinister building on the outskirts of Madrid where her sister Rocío lives with her daughter Alba.
The donkey, Rucio, tells the true story of Don Quixote and defends the idea that he wasn't insane, but a very intelligent, passionate and enthusiastic fellow.