This is a typical story from the 'cold war' era. A group of kids play on a quiet street in Sofia. From a nearby window falls a key. The helpful youngsters quickly return it to the owner, but in the haste switch the keys. The unintentional error disentangles a whole spy story. The young detectives doubt the good intentions of the man they tried to help. It turns out that the key is from a secret apartment where saboteurs are hiding. The secret network is exposed to the authorities and the kids feel like heroes.
as Veselin
as Yuliya
as Pesho
as Charli
as Bebo
as Zhivka
as Italiancheto
as Doncho
as Chervenokosiya
as Colonel Filipov
as Captain Naumov
as Toromanov
as Toromanova
as Chief of saboteurs
as Saboteur radio operator
as Saboteur
as Driver of saboteurs
as Pesho's father
as Pesho's mother
as Julia's father
as Yuliya's mother
as Bebo's father
as Bebo's mother
as Dentist
as Bai Lambi
as Director of the mine
