Can mere clouds threaten their colony? Blanche, a young paraplegic girl, watches the clouds dancing in the Phoenix sky. She soon wonders if their coordinated figures signal a threat. But the adults are too busy to listen, even her big sister Lupianne worries more about the air production's failing quotas than about some weird clouds.Then, as the dances grow complex and temperatures rise, the sisters must hurry to prevent the annihilation of their...