10 year old twins Ivy and Ash didn't expect to be visited by the ghost of their Grandpa Digby (who they've never met) on a stormy night. They definitely didn't expect him to announce that they have a home in Darkmoor (VERY different to Dartmoor), and that he wants them to come and run it as a hotel. They persuade their dad, an 'experimental' chef, to move to Grave Grange, a crumbling-down higgl…