Traversant une période difficile, Ava et Nathan vont s’associer à un mystérieux plombier qu'ils suspectent d’être un tueur en série, afin de monétiser la fascination du public pour ses crimes…

Three old friends from the Northern Irish capital – Saoirse, Robyn and Dara – are now in their late-thirties and lead very different lives. But when they receive an email informing them of the death of Greta, an old classmate they were once very close with, there’s clearly some unspoken, unfinished business. The trio’s subsequent adventure takes them on a journey across Ireland.