The atomic submarine Dolphin has impossible orders: to sail beneath the ice floes of the Arctic Ocean to rescue the men of weather station Zebra, gutted by fire... » 

The atomic submarine Dolphin has impossible orders: to sail beneath the ice floes of the Arctic Ocean to rescue the men of weather station Zebra, gutted by fire and drifting with the ice-pack north of the Arctic Circle. But the orders do not say what the Dolphin will find if she succeeds. «