The Six Swans

A king got lost in the woods and unfortunately he stumbled upon a witch who was willing to show him the way only if he married her daughter. After he agreed, the poor king's misfortunes followed one after another. The king was worried that the new queen may do something to his seven children so he hid them in another castle. However the evil step-mother found out and she managed to get rid of the six boys.
She turned them to swans. Their poor little sister was determined to save them. The price she had to pay was to stay silent six years, not uttering a single word. This cannot be possible, you may think. But believe us when we tell you that this was the smallest difficulty the girl had to go through. Find out the rest in "The Six Swans".