A mysterious greyness has descended on Whitehaven. Something has happened to the colour. Rumours start flying around all over the place. Is something wrong with the sun? Is it because of the chemicals the farmers are using? Mrs Rafferty announces that God is punishing the island because of all the sinful things that people are doing. Everybody has a theory, but nobody knows anything. Nobody except Margie and Henry. A terrifying adventure begins when Margie and Henry are led to an old mine shaft. What is the significance of the stone? Who is the thief of colours and can he be stopped?

Playwright and screenwriter Stephen Sinclair (Ladies Night, Lord of the Rings: The Two Towers) turns his talent for humour, imagination and tension into creating a compelling novel for younger readers.