Episode 1

E1

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

E2

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

E3

Unable to experience the hum the way the others can, and increasingly guilty about her relationship with Kyle, Claire has a crisis.

Episode 4

E4

Claire finally loses herself in the hum as the outside world closes in on the group. One last group session ends in tragedy.