When a narration starts in the middle of the plot instead introducing the context and characters in a logical way it's named with a <em>"Latin"</em> expression: <em>"In medias res"</em>, which basically means <em>"towards the middle of things"</em> or <em>"in the middle of affairs"</em>, and that is the technique used by Homer in Book 9 of the Odyssey, because starts 10 years after the collapse of Troy when Odysseus arrives to the Cyclops' Island, and he uses flashbacks later on to give context to the reader.