Paulo Duarte dies. An apparent suicide that does not convince anyone – neither the police nor his sister Teresa, who decides to leave her life in Lisbon to find out what really happened to her brother. Teresa is not mistaken and Paul’s death hides much more than it seems – an arms trafficking network led by Mauro Galdón, Teresa’s successful businessman and godfather. The unexpected death of her brother causes Teresa to see her life change suddenly. Unable to wait for the results of the investigation, he moves from Lisbon to Vigo, to work at his brother’s old company and investigate what happened to him. The events led to months of coordinated investigation between the judicial police of Spain and Portugal, under the watchful eye of Interpol.