In the fourth installment of the Grim Hill series, Cat, Clive, Jasper, and the rest of the crew are back, and everyone is buzzing about Darkmont High's student exchange to Sweden. For Cat, it means hanging out with her friends in a foreign country, travelling without parents, and not having to keep an eye on her clingy kid sister. Even though Sookie's magical meddling seems to be in check, Cat has been wishing for a break from the constant worry of living near Grim Hill. After all she's been through, Cat has learned to be careful what she wishes for. In this spellbound town, nestled in the shadow of Grim Hill, wishes have a tendency to turn against you. But this time, she isn't wishing for anything in this town; she is wishing to get out of it—that has to be safe, right?