Zeljko is the labour union leader at Gredelj Train Factory. His deputy, Mladen, has committed suicide after massive public protests and inter-union clashes. Zeljko is torn between the guilt he feels over Mladen’s death and workers' expectations that he will lead a strike that should thwart a plan by the government, acting on the EU’s behest, to declare the factory bankrupt. What'S to Be Done? is structured in three acts. The first act uses observational documentary footage; the second, footage filmed a decade later; while the third is fictitious.