Where Is Mikel? [Non dago Mikel?]

Donostia-San Sebastián, Basque Country, Spain, November 26th, 1985, at night. Mikel Zabalza, a young bus driver, is arrested along with other people by the Guardia Civil as part of an operation against the ruthless terrorist gang ETA. When the other detainees are released, they denounce that they have been brutally tortured in the Intxaurrondo facilities. Besides, Mikel is not among them: Mikel has disappeared.