Recent events have pushed the members of La Unidad to the limit, forcing them to move quickly and make tough decisions in order to get back on their feet and regain control of the situation.

La Unidad cannot get ahead of the plans of the terrorists, who are getting closer to achieving their goal, something that affects and stresses the team led by Carla even more.

The events are rushing on both sides of the border. The terrorists receive support, La Unidad suffers some setbacks that compromise its police work but strengthen the ties within the team.

The disappearance of an undercover agent, infiltrated into the terrorist cell, triggers all alarms. La Unidad investigates the surroundings of the detained terrorist leader to detect the connections and next steps of the terrorist cell that threatens Spain.

Lack of resources and pressure to catch terrorists increases tensions within La Unidad, whose members also have to deal with the personal problems caused by their exhaustive dedication to police work.

During a routine operation, Spanish police arrests the world's most wanted terrorist. This puts Spain in the crosshairs of jihadists. La Unidad, the unit which specialized in preventing and deactivating attacks, will have to work against the clock to avoid an attack.