The adventures of Christiaan, Daniel, and Hannah continue on the planet Hyperios. It's the third planet among the 12 Planets the three Tellurians have visited. It doesn't go well. They endure crisis after crisis. When Christiaan mysteriously vanishes while trying to return to Schyllus, Daniel goes in search of him, leaving Hannah all alone on Hyperios - for decades - just as things go from bad to apocalyptic. Daniel eventually finds his dad...