Chloe Blackthorne is an only child of parents who are rather older than many parents and who are quite strict. One day, she sneaks into the loft which her parents have forbidden her from entering, and discovers a strange telescope hidden away! Chloe quickly discovers that it has extraordinary powers to both see into the future and into the past, becoming her favourite possession as she explores time. One day while using the telescope in her garden, a happy-go-lucky boy named Jack sees her using it and asks to have a look through the telescope himself. Much to her amazement, she discovers that Jack can see exactly the same through it as she does! So begins a series of adventures which get steadily scarier as the two of them look further and further into the future. What exciting and terrifying adventures await Chloe and Jack with their extraordinary magical telescope?