Glaciologist Carlo and the mayor's daughter Lisa have barely been married when their marriage is put to the test. Lisa and her father are planning a ski lift on the nearby glacier, although there are growing signs that a catastrophe of apocalyptic proportions is looming deep inside. But an admonisher like Carlo only disrupts business. And so the tactically shrewd businessman and mayor instrumentalizes his own daughter against his hated son-in-law. Carlo's arch-rival Markus, of all people, offers to dive down into the glacier with Carlo via the meltwater channels in order to prove his suspicions and initiate rescue measures - a life-threatening operation that requires blind trust...