Humanity keeps everything it can, from sourdough to blood samples, and this film asks who decides what survives. Karl de Smedt, the world's only sourdough librarian, tends 144 starters in St. Vith, Belgium, some over a century old, each one a living archive of wild yeast. The German National Library in Leipzig and Frankfurt holds 34 million physical items, every book and recording published in or about Germany since 1913, and staff explain why digitization creates its own crisis: hard disks fail and files must be copied over and over just to survive. Professor Robert Grass at ETH Zurich shows a stranger fix, encoding data directly into synthetic DNA, a medium he says can hold information readable for over a thousand years. The film also visits BioBank Dresden, where tumor samples and bodily fluids sit frozen for future research, and the evidence room of the Frankfurt public prosecutor's office, where old case files get reopened and solved with techniques that did not exist when the crime happened.