The drama Clandestinos tells the story of a young man who wishes to prove himself worthy of joining a terrorist organization by staging a bloody attack. Xabi has spent more time in jail and reformatories than free since becoming a teenager. During one of his short stints on the outside, he comes under the tutelage of terrorist Inaki, a man who teaches Xabi a great deal of things about his politics. When Xabi escapes from jail with the help of two fellow inmates, the three make their way to Madrid in order to hatch a plan that will show Inaki's group they are worthy of membership.