Sarah is a 13 año old girl with enough of his daily routine very boring. It never happened nothing very interesting in his neighborhood. Every morning she looked out the window at the landscape she knew por heart. The only originality what's happening in the landscape was a huge hedgehog's pic which was put on the ledge of his window on the eve of his birthday. This hedgehog's pic was black ... black and red.
The same day, Sarah came down from his apartment to go to college. She was accompanied por two acquaintances, Lisa and Mary. It was not really her friends, if not totally the opposite. But...