There are two laws Arielle and her kind must abide by, that is, 1. Never use your powers on a human or let them see you using your powers. 2. Never tell a human what you are. When Arielle happens to fall in love with a human boy, she breaks both the rules, resulting in her own parents taking away all her powers and exiling her to live in the human world. A pixie living with humans? It was unheard of..