Would you give up the love of your life on the advice of a stranger?

When our hero meets Q, one Monday morning at a cinema in New York City, he has met the love of his life. Their romance quickly blossoms: in the rowboats of Central Park, on the miniature golf courses of Lower Manhattan, under a pear tree in Q's inner-city Eden.

Nothing, it seems, can disturb the lovers or prevent their approaching wedding.

Until one day a man claiming to be our hero's future self tells him he must leave Q...