Benji McLaughlin is a visionary. He believes in things other people think are impossible, like that he and his brother Stanley will be happy living with their uncle, and that the Loch Lochy monster is real, and that his parents will come home safely one day.

So when he finds out that Uncle Hamish's holiday business is struggling, Benji's not worried. He has a visionary plan. Together with his new friends, Murdy and Mr Dog, he sets off to prove that the Loch Lochy monster exists, and bring tourists flooding in.

But Benji might have to confront different monsters to the one he expects.