Have you ever heard a sound and not quite known what it is? It can be irritating and even unsettling. Now, imagine a lot of people in the same town begin to hear that sound. It is a hum – one that merits further investigation. Enter self-professed slacker and Omagh-native, Phil Taggart, to get to the bottom of it all. A hard-nosed investigative journalist he is not, but there is no better man to examine the characters and quirks of the county Tyrone town where the strange sounds have been emanating. Across three episodes, Phil meets shopkeepers, scientist, comedians, councillors and musicians, all with a view to uncovering the source of the hum. In Episode One, Phil turns to the people of Omagh to gather their theories on the hum. Ideas range from the mundane to the outlandish, while some locals claim it is nothing more than a figment of the town’s imagination. But when an actual recording of the sound finds its way to Phil, the hum begins to create more of a buzz.