Carol Cole has a problem.

Every time she falls asleep, she wakes up somewhere else in history.

One minute she's on a Manchester bus. The next she's sneezing at the Battle of Hastings, flattening Napoleon's soufflé, puzzling Roman centurions, or accidentally becoming part of Tudor legend.

At first, surviving each impossible jump is a challenge enough. But when strange objects begin appearing in her backpack, paintings start changing, forgotten memories return as letters from the past, and the moon itself begins to look wrong, Carol realises history isn't simply happening around her.

Someone is rewriting it.

With only her emergency backpack, her brilliantly obsessive friend Dave, and an alarming talent for waking up in the worst possible centuries, Carol must uncover who is altering the past before the future disappears altogether.

Because time isn't broken.

Someone is breaking it.