The documentary series accompanies the border guards of Spain in their daily fight against crime - on land, at sea and in the air. Around the clock, the men and women are on duty to pre-empt drug traffickers, smugglers and smugglers. The role of the security forces is manifold: from the fight against hashish transport in the strait of Gibraltar to the smashing of organized human trafficking at the airport in Madrid to the search for counterfeit branded goods in the port of Barcelona.