This third Vernon Bright title centres around the science of light. Vernon, banned from lighting the school play when he blows up the school orchestra, is allowed to video the performance. For Vernon this involves adapting the latest hi-tech video recorder - but now he finds he can video the future. For Dodgy Dave this is a chance to win the lottery, but all goes wrong as Vernon films the past instead. Then, to Vernon's horror, he finds a film of his own death! He's in despair, until he has to take the part of the corpse in the school play - and his shouts of joy at being alive ruin another school production.