Childhood polio has left Reggie Rainbow with a limp, but his strong arms and nimble fingers are perfect behind the scenes of down-at-heel variety theatres-where he helps illusionist Mr Brookes 'disappear' his glamorous assistants. When Mr Brookes accepts a booking at the Brighton Grand, Reggie finds himself in a strange new town. The seaside air works its own magic and the disappearance boy begins to wonder how much longer he can go on keeping secrets for a living...