Puck, expelled from boarding school on Earth, is on her way to stay with her parents on the planet Shoon. On board the spaceship she befriends Hush, a native Shoowa who is also returning home in shame. He is desperately seeking a stolen treasure that was entrusted to him, a symbol of freedom for his people. Puck and Hush must find the precious Soo before they reach Shoon. But who can they trust? And how will they save their own skins as they hurtle through space on a ship haunted by terrifying ghosts?