Episode 1
When Claire starts hearing an incessant rumbling sound, no-one seems able to help – until her student Kyle claims to also hear the noise.
Episode 2
Claire and Kyle discover a group of other people who not only can hear the hum but want to embrace it. However, Kyle's mother finds out about their meetings.
Episode 3
Unable to experience the hum the way the others can, and increasingly guilty about her relationship with Kyle, Claire has a crisis.
Episode 4
Claire finally loses herself in the hum as the outside world closes in on the group. One last group session ends in tragedy.
