A teenage boy disappears without a trace. His sister Milica and two of his friends, Bogdan and Darko, are on the lookout. The police are one step behind the kids in the search. The parents seem to be reluctant to admit that he is missing.
The kids follow the leads they found in the homeless old man's place. Nobody else seems to care that much. Police investigator Sonja is at a loss - there were other missing children in the past years. There is the dead body found.
It turns out there have been more missing children. They went missing in the same block of buildings - but does that block even exist? Milica's family is falling apart. The other two boys have their family secretes.
Bogdan's grandfather was the construction engineer of the blocks were built back in the 60s. Darko has problems losing the drugs he was supposed to sell. Name of Block 27 seems to appear, but that block does not exist.
