On the planet Ilmatar, under a roof of ice a kilometer thick, a team of deep-sea diving scientists investigates the blind alien race that lives below. The Terran explorers have made an uneasy truce with the Sholen, their first extraterrestrial contact. So long as they don't disturb the Ilmataran habitat, they're free to conduct their missions in peace. But when Henri Kerlerec, media personality and reckless adventurer, ends up sliced open by curious Ilmatarans, tensions between Terran and Sholenn erupt, leading to a diplomatic disaster that threatens to escalate to war.