Stan, clearly panicked about something, comes flying around the corner and pulls Kyle and Kenny aside, claiming that he needs to talk to them. Kyle asks Stan what the problem is and he tells them that he caught wind that Trent Boyett, a classmate from their preschool years, was about to be released from juvenile hall on parole. Kyle and Kenny are equally horrified by the news and they also begin to panic. A passing Cartman dismissively asks the boys what the problem is, but his passive behavior turns to fear when he is informed about the news. Kyle suggests that maybe he has forgiven them claiming that they, "were only in pre-school".

The boys recall the incident from their pre-school days. In their flashback, they get the idea of playing 'fireman', starting a real fire and extinguishing it. They just need someone to start it, so they ask Trent Boyett, the toughest kid in pre-school, who agrees when they tell him they know how to put out a fire. Butters advises them against, however, he is ignored. When the fire first starts, the boys urinate on it, trying to put it out. Once they stop urinating, they claim that they, "saved the school" despite the fact that the fire was still burning. As the fire begins to grow out of control, Trent begins to panic and starts screaming at them to put it out. When their teacher, Miss Claridge, notices what was going on, she blames Trent and tries to extinguish it only to become engulfed in the flames herself. Cartman and the boys then run over and urinate on her to try and put the flames out. Shortly afterwards, the police arrive and instead of taking what might have been the easier route by saying it was an accident and risking getting into trouble, the boys use Trent as their scapegoat when they realize he was the one who started the fire. When approached by the police the boys lie and say they were not involved and call Trent a liar when he pressures them to tell the police that it was just an accident. Trent begs Butters to come to his defense, but Butters refused as he feared he would be grounded for getting involved. As he is being taken away, Trent claims that the boys better pray he never gets out of juvie. Kyle remarks to the others that Trent is going to be furious when he gets out, Cartman dismisses his worries under the notion of, "That's like five years from now." to which the boys agree. The scene cuts back to the present day where Stan remarks that now the five years are up and Trent is being released. Cartman suggests that they tell their parents, but Kyle reminds him that they cannot go to anyone for help because they lied to everyone and no one knew that they were responsible for Miss Claridge being crippled. Stan quickly shushes the boys when he sees Miss Claridge approaching.

[S8E10] Pre-School