The story stars teenager Kornél, who is raised alone by his mother and suffers from asthma, which often prevents him from playing with his friends, and Gyuri, who is the same age as Kornél, but lived in the same house 30 years ago. During the summer holidays, a strange little girl turns up and tells Kornél amazing stories about the house's inhabitants and their mysterious past. Iza inhabits a whole little magical universe in which everything and everyone has wonderful properties and abilities. The boy and the girl embark on a joint investigation to find the former Garaboncias, Kornél's father, who has been kidnapped by the evil Shadow Robbers (Peritons)...