Opera Philadelphia plays host to Missy Mazzoli and Royce Vavrek's story of how a simple ringing in the ears can turn a group of people into a terrifying cult. When Claire begins hearing a maddening low-frequency droning sound that never stops, she enlists the help of a group of people who have formed to try and stop the noise that has been permeating her life. Unbeknownst to her, though, the groups actions may lead to catastrophe...