There's something lurking in the stifling darkness and labyrinthine tunnels that run below London... something old, something vicious, and something very, very hungry. It's the hottest summer on record and London is dying. Prices are high, pay is low, and stressed commuters are packed onto London Underground trains again like the pandemic never happened. To add to the misery, the temperatures underground just keep climbing and climbing, the heat trapped in the clay with nowhere to go. Then one fateful morning five travellers on an unlucky tube carriage find themselves bound together as witnesses to a single horrific event - an event they can't quite seem to remember. They make an unlikely team - a weary tube driver, a disillusioned civil servant, an ambitious city trader, an overwhelmed hotel worker, and an unhoused young man just trying to get by - but now they must come together to confront what they have seen and stop it in its tracks before it kills them all. From the dark and twisted mind behind Thirteen Storeys, Family Business, and podcast sensation The Magnus Archives, The Burn Line is a sinister and socially conscious horror masterclass perfect for fans of Stephen King, Jordan Peele, and Black Mirror.