Family of eight-year Каролинки moves in a new apartment. While adults collect and take away things, a girl by chance finds on the floor, in cracks, little blue bead. And not simple, and magic - a bead carries out any wishes!So the unbelievable adventures of Каролинки and her true friend Петрека begin: they fly on air, transform in invisible men, revive wooden Baba Ягу and lithoidal lions, are at war with a wicked sorceress Филоменой. But the number of desires that a blue bead can carry out limits, and friends study to distinguish trifling funs from things important and standing."Blue бусинка- the first part of famous дилогии of Maria Крюгер (1904 - 1999).