Whenever I see a horror movie, the test of its effectiveness usually happens long after the credits roll. A good horror movie can shake you in the moment, but a great horror movie sticks with you, lodging itself into your brain, making you fear the noises that go bump in the night. undertone follows Evy (Nina Kiri), who has moved back home to take care of her dying mother (Michèle Duquet). Subscribe to our newsletter for more undertone deep dives Hungry for more analysis of films like undertone? With undertone, Tuason has created one of the few horror films that’s even more horrifying to hear than it is to see.