The story of the 26-day crossing of the Atlantic by the semi-submersible intercepted off the Galician coast with cocaine inside, manned by Agustín Álvarez, a former promise of Spanish amateur boxing.
The journey of the narco-submarine seized off the Galician coast begins in the Amazon jungle, in a clandestine shipyard and with a crew made up of two Ecuadorians and a Galician pilot who was recruited at the last minute.
The submarine goes out into the Atlantic and before reaching the Azores it comes across a storm that causes a breakdown. At the same time, the notice is given that an "unusual" vessel is heading for the European coast.