Mysterious events are piling up in the oceans around the world: whales destroy boats, deep-sea crabs attack beaches, mussels paralyze container ships. A previously unknown ice worm destabilizes continental slopes in the oceans and triggers tsunamis. A deadly pathogen is spreading from the coasts in drinking water. More and more people in the world are in mortal danger. On the feverish search for the causes of the mysterious phenomena, a small group of international scientists comes together and the previously unthinkable finally becomes a certainty. A previously unknown species exists in the sea and this swarm intelligence is attacking mankind. But hardly anyone believes the researchers. And so the group dares to go on a life-threatening mission on their own. The traces lead them with their research ship into the eternal ice of the Arctic Ocean. An ecological thriller based on the international bestselling novel by Frank Scha\u0308tzing. The most expensive German TV production of all time.