The first-ever stage adaptation of the 1996 novel by Stephen Fry. Michael Young is a brilliant young history student whose life is changed when he meets Leo Zuckermann, an ageing physicist with a theory that can change worlds. Together they realise that they have the power to alter history and eradicate a great evil. But tinkering with timelines is more dangerous than they can imagine, and nothing " past, present or future " will ever be the same again.