A film unit sets sail for a deserted island north of the Arctic Circle. But what begins as a routine trip for the charter ship 'Morning Rose’ turns into a whirlpool of murderous intrigue. A killer sails with them. Bear Island is lonely, desolate and bathed in Arctic darkness most of the year. It’s a graveyard of the Arctic where Nazi submarines lay in wait for the Murmansk convoys. Someone among the crew wants the secrets of the Bear Island to stay undiscovered. Events build up to the tremendous climax in the darkness of the Polar night.