Burbujas de acero

The diver Álex Vinaroz finds a semi-sunken submarine through some unusual bubbles in the cove of Puerto Calderón, in Cantabria. Despite being a World War II U-Boat, he discovers that its contents are not military. On the other hand, a Bahamian flag English treasure hunter, the Dauntless, is approaching the coast of Cantabria. After years of research, the area in which the submarine is to be found is almost limited. On board, Tim Maplewood, believes that they are going in search of one more treasure, like those of the dozens of looted galleons, but his partner Edward Hobson looks for something different, since he does know what the wreck contains.