At the center of The Glossolalia is Godot Gargon, an actor engaged in nonstop narration about the practice, performance, and promotion of his role as Insalubre, the lead character in an enigmatic cinema-verite-style film. His agent, director, therapist, and entourage careen around his ambition "to declaim the certain and the unequivocal." Haunted by his estranged brother, he performs his way through present-day Los Angeles, turning his personal life into a film that he speaks into existence.