David is a 20-year-old man with a mild intellectual disability who lives with his parents in Ústí nad Labem. One evening, he sneaks out of the house with several hundred crowns in his pocket and heads for Prague, where his brother lives with his girlfriend. He wanders the city alone and nobody notices him. He spends his time on the metro, in streetcars or at the train station. He becomes increasingly depressed – a state of mind he fails to come to terms with. This stark account of several days spent wandering in an alien world in which he feels unhappy and confused is told in parallel with his desperate parents’ search for their son. Although the film presents an unusual study of loneliness, in this case determined by the main character’s “difference,” it tells a universal story. It offers a look from the inside, characterized by a minimalist and compact narrative style.