13-year-old Nelly Klabund is furious! Against her will, she is supposed to spend the summer vacation with her parents in Romania. Things go wrong right on the way there - the plane lands unscheduled in the middle of Wallachia and then the supposed tour guide Holzinger accidentally reveals a secret to Nelly: the Klabund family is soon to move to Transylvania in Romania because Nelly's father is going to take up a great new job there. Nelly is shocked! How could her parents betray her like this? She's supposed to give up her whole life - her friends, school, the skate park? Never! Nelly goes crazy, runs away and wanders lost through a strange city in the middle of Romania. She runs straight into the arms of two really shady characters. The two turn out to be the nasty villains Hokus and Iancu, who kidnap Nelly and hide her in a remote Roma village. There, Nelly gets to know a world unknown to her and befriends the mysterious Tibi and his sister Roxana. But when the two help Nelly to escape, the adventure really gets going: a wild chase through Transylvania begins, because the kidnappers, who are acting on behalf of an unscrupulous entrepreneur, are not giving up for a long time...