Day of the Gusano documents not only a historic Knotfest Mexico City performance from Slipknot, one of the most exciting live bands on the planet, but delves deeply into the lives of the band's fans as well. Slipknot's fans, better known as maggots, are essential to the band's legacy. This highly anticipated show captures the chaos, excitement and community that has been cultivated over the past 20+ years.