Undertone review: Audio terror hits home

The bump in the night is a horror staple for a reason. There's something uniquely unsettling about a sound you can't explain. Undertone, the latest horror movie from A24, delves into the eerie earworms that might echo through nightmares. 

Written and directed by Ian Tuason, Undertone centers on an isolated podcaster named Evy (Nina Kiri), who becomes fixated on a series of mysterious audio clips. As she goes down the metaphorical rabbit's hole on what they could mean, the world around her seems to shift...