Abhartach is a story from Irish mythology written in blood. The music of Siobhán Cleary and soloist, Úna Monaghan, evokes this dark tale of a tyrannical warlord who developed a taste for blood and couldn't be killed. A neighbouring Chieftain, Cathán, with the help of his wolfhound and a druid attempts to end the supernatural rampage. The film responds to the dark atmosphere of Cleary's music and shifts away from a linear narrative, instead leaning into abstraction, horror and experimentation.