All the copies of a film have been stolen at the pre-production stage and Harry is called in by its director to try and recover them. Whilst they are talking in his office, they are joined by the alleged thief, who offers to return the prints in exchange for a ransom. The money is duly paid and the blackmailer steps into the lift. However, he is not seen to get out again, or to leave the building. How did he vanish into thin air?
—don @ minifie-1