The Unit

During a routine operation in Melilla against an Islamist network devoted to recruiting young people to their cause, the Antiterrorist Unit of the Spanish Police unexpectedly catch Salah Al Gahreeb, an outstanding spiritual leader of ISIS.

The leader of the terrorist cell, Kadir, and its two other members, cross over into Spain after stealing explosives at a mine in the Pyrenees. They hide in the town of Salt, in Catalonia, where they await orders to strike.

Marcos heads the party that searches for the two terrorists all over the area. Now that the fugitives no longer have any weapons or any logistic support, he thinks that they'll soon catch them.

Sala Al Gareb commits suicide inside the isolated prison cell where he has been confined. As far as Carla's bosses are concerned, his death probably means the end of a complex and uncomfortable situation. However, Carla thinks that there might be a subtle, pre-planned purpose behind his suicide. She thus discovers that Al Garheeb was able to get in touch thanks to his lawyer, with other convicts that sympathized with the Islamists' cause before he took his own life. Accordingly, all suspicious inmates are isolated. But by then, some of them have already been released from prison. Miriam finally succeeds in setting up a meeting with the informer of the CIA who had seen Al Garheeb in Nigeria. She flies to Lagos where she meets the man in question: William, an arms dealer.