Miserere is about six young men who prostitute themselves for little money in Once Train Station and Plaza Miserere, a central area in the city of Buenos Aires. Structured as a chronicle of a summer day, the documentary presents the stories and inner reflections of the protagonists through voice-overs. The routines of these street sex workers show the complex and multicultural universe of Once. Miserere reveals an invisible problem: the prostitution of needy young men in Latin American cities.