Brendan works solo shifts in the quietest toll booth in Wales, hiding from a criminal past where nobody would ever look. When he finally gets rumbled, word of his whereabouts gets out and his enemies head west for revenge. Meanwhile, local traffic cop Catrin’s investigation into a simple robbery finds her heading for the booth at exactly the wrong time.

Blue Monday is a modern day twist on Under Milk Wood. While Under Milk Wood lifted the lid on the small Welsh village of Laugharne over the course of one single day, Blue Monday lifts the lid on the lives and loves of the large city of Cardiff. Blue Monday, the most stressful night of the year. Four people with a decision to make, one that could change their lives. A cabbie, two police officers, a bar maid and a nurse (who also works in a neighbourhood brothel). One woman prepares for a reunion with a daughter she gave away at birth, another will have to choose between survival and family, a taxi driver comes to a shattering decision regarding his lover, while two police officers wrestle with their own demons while attempting to deal with the demons of others. A night of decisions. Followed by days of regret. Or not.