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 靛青之夜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.