Past and present events merge as Alice, Frankie, David and Michael research a 'Then and Now' photography project in the Northumbrian borderlands. As they develop some film from a sunset shoot at Worm Hill, the kids are shocked to find that the camera has picked up more than just the scenery - they see a ghostly image of a woman crying out for help. Who is she and why did she chose them? Are they brave enough to find out?. . .
