Euskadi 1985. El colegio ha terminado, por fin llegan las ansiadas vacaciones. Marcos y sus tres amigos, José Antonio, Paquito y Toni, reciben expectantes la llegada del verano, un verano prometedor sobre todo porque a sus doce años poco importa dónde, ni cuándo, ni cómo. Recorrerán las horas en el laberinto que la vida les ha deparado, en una Euskadi antigua, luchadora, convulsa. Un laberinto de paredes grafiteras, donde rebotan las pelotas de goma y los sueños de libertad; cubierto de un cielo gris prefabricado en cooperativas, donde la muerte y la vida ya no mantienen relaciones formales.

The plot introduces us to compulsive gambler Sergio, who, despite having promised his partner that he has overcome his accursed addiction, receives a tip-off about a rigged football match. Fully intending to get back all of the money he has lost recently, he returns to his regular betting shop, intent on winning. Everything seems to be going swimmingly, when suddenly Alejo, another habitual gambler, bursts into the joint with a weapon.

The plot introduces us to compulsive gambler Sergio, who, despite having promised his partner that he has overcome his accursed addiction, receives a tip-off about a rigged football match. Fully intending to get back all of the money he has lost recently, he returns to his regular betting shop, intent on winning. Everything seems to be going swimmingly, when suddenly Alejo, another habitual gambler, bursts into the joint with a weapon.