There is nothing peculiar about a young girl sitting alone at a table and drinking a coffee. It is a different story when you walk in a small city cafe on a rainy day and you see a 50-years old woman, with a rather shy look, wearing a black silk dress and drinking her coffee.
A young boy on the metro, carrying a huge teddy bear in his arms, an elegantly dressed man, walking a bit absent through the Museumsquartier in Vienna and eating an apple, a lonely woman in a café, they are people you randomly meet and  take one photograph of them, but you don't ask further questions because the context is not always proper. They are the strangers who tell their stories with a single glance.