Elsa is on the run and is urgently seeking a safe haven. Nightingale is being held captive and forced to use her songlight against her own people. Piper has been promoted up the ranks of the Airmen, where nothing but bloodshed is demanded of him. Rye has stumbled across an incredible airship, the likes of which has never been seen before. All four are united by their desire for peace. But peace between the Aylish and Brightland feels more fragile than ever. And there is a new threat, not just to Brightland, but to Ayland and the world beyond. The airship that Rye has discovered is owned by the Sealanders, a race of elite Torches, recently returned to Earth. The future of civilisation is on a knife edge, with those from Brightland wanting to stamp out songlight, those from Ayland wanting harmony and those from Sealand wanting songlight to rein, whatever the costs.