Barnaby Grimes is a tick-tock lad - he'll deliver any message anywhere any time. As fast as possible. Tick-tock - time is money! But strange things are afoot. One moonlit night, as Barnaby highstacks above the city, leaping from roof to roof, gutter to gable, pillar to pediment, a huge beast attacks. He barely escapes with his life. And now his friend Old Benjamin has disappeared . . .