
Claire, a popular English teacher, begins to hear a low humming sound that no one else around her can hear.

As the outside world closes in on the group, one last group session ends in tragedy.

At first resistant, Claire finally loses herself in the Hum.

Unable to experience The Hum the way the others can, Claire has a crisis.

Claire and Kyle discover a group of others who can not only hear The Hum but also want to embrace it.