Blackout stabbing of Communist secretary-general
During a Central Committee meeting of the Spanish Communist Party in post-Franco Madrid, the lights go out and secretary-general Fernando Garrido is found stabbed. The killer is someone inside a closed room of party insiders. The party distrusts a state police force still staffed by Francoist-era officers, so it hires Pepe Carvalho, an ex-Communist and ex-CIA private detective from Barcelona, to investigate alongside that police force.