Eefje Dark Blue lives happily in her dark blue house with dark blue chairs, a dark blue table, a dark blue bed - in short everything in Eefje's house is dark blue. Even her best friend Antonio, her dark blue fish. When Eefje Dark Blue gets lonely in her big dark blue house she decides to sell her blueberry jam to the Grey citizens but they aren't interested in buying her jam and certainly don't want to talk to her. Because of that Eefje feels more alone then ever. She is discouraged and decides that she does not need anybody else. She could not be happier alone in her dark blue house. But what happens when she encounters a sweet yellow prince?