Not sure why the description says "A collection of stories" or "very complicated". "Silver Triangle" is not a collection but a full story that deals with a sci-fi setting, a lost civilization, time travelling, mysterious magic, music and cloning. It is one of my favorite Moto Hagio's stories, and if it all seems complex at the start I promise the elements will unravel soon. The manga is more like a puzzle than told in a linear way: stick with it, please! The general (no spoilers) plot is this: In a futuristic world of humans and alien species, Marlee is a government agent (from a civilizationcalled Central) who decides to meet with a friend to attend the concert of an extraordinary opera singer. When the singer is killed, Marlee decides to look for the travelling musician Lagthorin, who is someone the opera singer has been wishing to meet since she saw her and a mysterous boy in a mirage-like dream.