Magic is once again afoot in Scotland when Allie and Jay visit their grandfather and are eagerly greeted by the Boggart, an ancient sprite, and his cousin Nessie, formerly known as the Loch Ness Monster. Things are rarely peaceful with two boggarts around, but this time a real estate developer is the one causing a disturbance - a man named Trout.

Trout is building a luxury resort, and is desperate to buy up everything in town - including Allie and Jay's grandfather's shop. He's willing to do almost anything to raze the store to the ground. But with his beloved family under attack, the Boggart doesn't stay silent for long- soon bulldozers are mysteriously driving themselves into the loch, and surveying flags are floating off into the sky, but Trout is unmoved. When Nessie tries to scare him by transforming into the Loch Ness Monster, Trout is delighted - what a sensational tourist attraction he's found!

Allie, Jay, and the boggarts will have to use all of their wits to outsmart the developers and save their home - even if it means waking up all the Old Magic creatures. Even the deadly ones . . .