Our distant descendants have forgotten movies. Upon discovering some buried in a vault, along with a projector, they are surprised to learn that they convey stories when watched. How do these stories "emerge" from celluloid? At first little is known about film or projectors. But future scientists study these things, and gradually understand them better: it is re-discovered how images are created on celluloid, how they are projected, what frame rates are needed to show smooth motion, what chemicals make up celluloid: all interesting discoveries. And thus, the scientists assure their compatriots, it will only be a very short time before it is discovered exactly which chemicals in the celluloid produce the plot of movies. After all, with all of their other new discoveries, it would be foolish to say that it won't be any day now that they will pinpoint the plot molecule (or network of molecules), and how celluloid produces plots will be fully explained.