Doug Johnstone returns with his most explosive and original thriller yet ... A little lie ... a seismic secret ... and the cracks are beginning to show ... In a re-imagined contemporary Edinburgh, where a tectonic fault has opened up to produce a new volcano in the Firth of Forth, and where tremors are an everyday occurrence, volcanologist Surtsey makes a shocking discovery. On a clandestine trip to new volcanic island The Inch, to meet Tom, her lover and her boss, she finds his lifeless body, and makes the fatal decision to keep their affair, and her discovery, a secret. Desperate to know how he died, but also terrified she’ll be exposed, Surtsey’s life quickly spirals into a nightmare when someone makes contact – someone who claims to know what she’s done …