"In the Basement of Apollo Hall" delves into the greatest and most significant question for a composer: What is music, and why does it exist? Attempting an answer Appelqvist draws upon the philosopher Friedrich Nietzsche's theories about art, where the Greek gods Apollo and Dionysus are used to describe humanity's inherent conflict between order and chaos, a tension that also plays out within the music.

Tomas and Martin are a gay couple living in Paris whose marriage is thrown into crisis when Tomas impulsively begins a passionate affair with young schoolteacher Agathe. But when Martin begins an affair of his own, Tomas must confront life decisions he may be unprepared—or unwilling—to deal with.

As the Summer break comes to an end, Cédric, Romain and Carlos' friendship gets rocky while playing what might be their last Warhammer game together.