"AAAAAAAAAAAAAHHHHH-CHOOOOOOOOOO!"
Strange things are happening to thirteen-year-old Polly Everett. Unsettling changes to her world lead her to question her memory - and her sanity - but no-one believes her.
With the help of Mr Jenkins, her science teacher, Polly realises she's not going mad - she's travelling between parallel universes. And these dimension-hops seem to be triggered whenever she sneezes!
Polly finds herself propelled from universe to universe, where familiar people are disturbingly different, in a thought-provoking adventure that provides a unique take on the 'what ifs' of everyday life.