A dinosaur clone escapes from a scientific laboratory. It swims across the Rhine River to Germany's largest lake—Lake Constance—and begins killing innocent people. All the usual clichés are used: the main scientists (a divorced couple who find each other again during the story!) have been fired before the final experiment; children go swimming at night, even though everyone knows there is something dangerous in the lake; the equipment is completely destroyed because someone shoots at the screen...

Barbara Rudnik
as Eva Lehmann

Stefan Reck
as Marcos Lehmann

Anna Schmidt
as Anne Lehmann

Peter Rühring
as Dr.Josef Keppler

Franz Buchrieser
as Kommissar Schuh

Romuald Pekny
as Eberhard Riedle

Michael Schiller
as Bornhak