To satisfy his appetite, the mischievous dragon Bijou makes his way across the Milky Way, devouring everything that shines in his path -- including the Sun. Earth is plunged into darkness, and the villagers of Tomtitou are left in despair, until young Hugo—armed with his telescope—makes contact with a mysterious star named Aramis. Together, they embark on a fantastic celestial journey. Will Hugo and his new friend succeed in restoring order to the universe?