A shoal or a school of fish moves based on three principles: the fish swim next to one another, always try to close ranks, careful not to bump into one another. But if there is a disturbance in the shoal, the rules break down and the shoal disperses. By filming Dubrovnik during a day in August, from morning till night, the people that walk its streets, amidst the harmony and the contradictions of the city, become an aquarium of sorts recorded by the camera's eye. The movements of the people and the fish overlap, while their similarities and differences are discussed by ichthyologist Dr. Nikša Glavić, in charge of the fish at the City Aquarium, and Vedrana Divić, a women who cleans the fish at the Gruž market every morning.

Branko Istvancic was born in Subotica. Graduated film and TV direction in 1999 at Academy of Dramatic Arts in Zagreb. His student short fiction Saying Goodbye was included in the New Direction programme of The First Film Foundation in London,
a selection of six outstanding films by promising European directors. His successfully film, Wellman (2003) elevates the simple story about a well digger to a level of the universal metaphor. The critics consider his film The Cormorant Scarecrow (1998) to be one of the best Croatian documentaries of the nineties. His debut The Ghost in the Swamp was a domestic box-office hit and has been chosen to mark the comeback of feature-length films for children which have not been made by the Croatian film industry for the last twenty years. He is member of Croatian Film Director's Guild.