Freddy and Polly are used to helping their father with his experiments. So they don't mind being put into cryonic suspension - having their hearts frozen until their father wakes them up again. They know it will only be for an hour or two, so there's nothing to worry about . . .
Ben and Rachel have resigned themselves to a long, boring summer. Then they find a hidden underground vault in the garden containing two frozen figures, a boy and a girl. And when Rachel accidentally presses a button, something unbelievable happens . . .
Can Polly and Freddy adapt to the twenty-first century? Will their bodies survive having been in suspension for so long? And most important of all, what happened to their father - and why did he leave them frozen in time?
See More Adventure stories
Ali was a local newspaper reporter and columnist before joining BBC local radio as a producer and presenter, and then chucked in the safe job to be dangerously freelance and write scripts and manuscripts. Her first venture was as a comedy columnist on the BBC Radio's top-rated Woman's Hour and Home Truths programmes. In 2010 she won the Blue Peter Best BookMore about Ali Sparkes