Summary:
In Polyphonica spirits materialize in the world and work together with humans. Although spirits do not appear that often, some have the ability to take on human forms. Dianist are a special group of humans who can play a music called "Commandia". This music allows them to make a contract with the spirits that take on human and animal form. Phoron Tartara is beginner Dianist and has a contract with Corticarte Apa Lagranges, one of the strongest spirits. The stories follows the two as they work at the Tsuge Divine Music Player Office.
