Bees live in houses full of cells - hives. They work all day and have to work hard so that the hive grows and that, one generation of bees, is followed by another. Apis is a bee that lives in Reus. One day, flying from flower to flower, he realizes that in the streets of the city there are a lot of golden hexagons like the cells of his hive. Thanks to her curiosity and helped by some animals that she will meet, from hexagon to hexagon, she will discover the modernist work of Lluís Domènech i Montaner.