Ulysse is 21 years old. He never really knew freedom, having to move from place to place with the others. As a child, he was stuck in the Astral Domain (a former hospital turned experimental laboratory). He and the others have what is called an “irregularity”. Discovered a hundred years ago, scientists now test children they believe to be carriers of irregularities. Ulysse is one of these carriers. To his great despair.