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The Mariana Trench in the remote Pacific Ocean. There, at a depth of 7 miles, in the pitch blackness of this hellish abyss, a terrifying monster has been living for millions of years - the megalodon carcherodon, a twenty-tonne ancestor of modern white sharks, which everyone thought was extinct. The monster is able to sense the impulses of a victim from many miles away, no matter who or what it is: a person, a sea animal, a ship. Even a drop of blood dissolved in millions of litres of water makes this creature rush in search of food...