At the beginning of 2020 and for more than two years, at least four agents of the National Police Corps infiltrated various social movements in the Catalan Countries. They are part of the 33rd promotion of the Ávila Police School and act under the orders of the General Information Police Station. The documentary exposes the modus operandi and patterns of the police officers and reveals some of the mistakes that were key to discovering them.

Directors: Gemma Garcia Fàbrega, Sònia Calvó