CCorto, Tristan, and Steiner sail along the Brazilian coast in search of the wreck of a Spanish galleon loaded with gold. It is supposed to be somewhere in the vicinity of Marajò Island, at the mouth of the Amazon River.
But they are not the only ones on this treasure hunt; they’re part of a plan hatched by Bocca Dorata. Not only will a German baron and a British secret agent intervene, but also the dangerous Jawbreaker, whom Corto will have to confront.