La isla minima

1980. In a little town close to Coto of Doñana (Andalusia, south to Spain), two teen girls have disappeared. The father of one of the girls, who have connections with important people in the forces of the law, gets that two police detectives of homicides from Madrid are assigned to the mission to find the girls if they are alive, or find the assassin if they appear died. The detectives are Pedro Suárez and Juan Robles. While that Suárez is a young, taciturn and circumspect agent in a Spain that it tries to find a new identity as democratic country after General Franco's death in 1975, Robles is a veteran, funny and expeditious agent, with a mysterious past as alleged member of Franco's Armed Police dismantled in 1978. Unable to reconcile one with each other, Suárez and Robles find trapped by the hostile environment of a place where the old Franco's methods and customs still alive, and where they two aren't welcome. When the girls appears died, the following investigation move the cops