A sleepy, provincial Bulgarian town is preparing for a big event – the revealing of a new, modern Public Warning System for alarms and disasters with new speakers and sirens.
In a hut on the hills above that town, Milko spends his days in voluntary exile, preparing for the end of the world. His routine includes physical preparation and hoarding basic survival supplies in his basement. The locals are used to his warnings, and accept him as part of the landscape.
When Milko encounters a group of illegal poachers, his alarm is met with apathy and indifference. The police in town have bigger fish to fry – the System turns out to be malfunctioning, and the town is forced to live under its’ constant howl.
Milko begins an investigation of his own that uncovers some of the locals’ secrets and turns them against him – with the exception of an ambitious young policeman, who finds himself slowly being drawn into Milko’s world and ideas.
And the sirens keep howling, and howling.