There are NOMACs, characters called Evangeline, Faythe and Nefayrus and they all go on a big adventure. There's some machines as well that make noise sometimes, and the whole story seems to be something to do with music itself
Definitely on the music only option here! I've never been too interested in stories told through music unless there's a stage and some acting as well i.e. a musical. Even Scenes from a Memory, probably my third favourite album ever. As far as I know that story includes Nicholas and Victoria, a murdered girl (Victoria?), someone going Home and a gunshot