In the year 2020, underwater fishermen hear a sound under the waters of Cala Tuent, on the island of Mallorca. At the same time, the number of strandings of cetaceans, whales and dolphins on the coasts of the archipelago increases exponentially and, during NATO military manoeuvres in the Mediterranean, the anti-submarine radars stop working.
Toni Figueroa is an agent of the National Intelligence Centre assigned to the island to investigate...