A few days before St. John’s Eve, all the world’s oceans fill with dead fish. The phenomenon worries environmental agencies who can’t find no explanation at all. On board the Vizconde de Eza, a ship owned by the General Secretariat of Maritime Fishing, a group of biologists and geologists sail into the Mediterranean to prepare a report but they end up witnessing in horror one of the most incredible experiences of their lives.

At the same time, the sea-beds explode: a chain of submarine earthquakes devastates the seas with fatal consequences for coastlines. This, however, is just the beginning of a series of events which will put humanity at risk.