Revolutionaries with a submarine, in the 19th Century? It didn't happen this way... but it did happen.
A secret society of revolutionary Irish Americans, and a nineteenth century super weapon that might change the course of history. If, that is, it ends up in the right hands. Whose hands? Who knows? The origin of the submarine as a naval weapon is a strange story, and stranger still when it's mis-told on The Music Of What Happens.