Megan Shaw is tormented by noise from upstairs neighbors. She buys "Absolute Silent Earplugs." The world falls silent. She learns the upstairs family was murdered; the seller vanishes. Noises return, and time resets. It's an unsolvable time loop. The earplugs make noise-makers disappear. Megan plans revenge, but it leads to imprisonment. She realizes the seller was her future self; the loop never ends.
