Pedro Ribera, a successful writer, gets a call from a notary. A woman he doesn't know, Berta Astomi, has just left him a generous sum of money in her will. But there is one condition: he must write a novel inspired by Berta's life in a short time. In his research, the writer will soon find out that his mysterious testator was a passionate and proud woman, the victim of slander and consumed by a desperate desire for justice. Snail Slime is a brave novel that covers the 20th century in Spain, particularly the long post war years. In its pages, the reader will gradually discover that History is made up of multiple small histories, anonymous and real.