Over thirty years have passed since Tom Crane left Department 7, a top secret organisation that investigates the paranormal. Anne Reynolds now runs the operation, and for three decades their enigmatic nemesis Omega has been silent. Based on the 1979 BBC tv series created by Jack Gerson. Tom Crane is supposed to be taking a break from the paranormal, but a plea from Anne draws him unwillingly back. Something is happening to a group of performers at the Edinburgh Festival - preternaturally talented children working closely with Department 7 - and even the usually unflappable Martindale is spooked. Why is Tom so affected by the children's performances? Who stands to benefit from their bewitching talents? And what is the connection with the mysterious Morag, who has started haunting Tom’s dreams...?