In the Welsh folk-horror “Rabbit Trap,” debuting director Bryn Chainey creates an disquieting acoustic atmosphere and guides his trio of actors to powerful performances. However, these flourishes serve a muddled piece that coasts on its interpretability alone.

Instead, the film starring Dev Patel and Rosy McEwen takes a shockingly steep dive into narrative tedium and ho-hum genre beats. What initially begins as a formally adventurous tale of a husband and wife trying to make sense of a sound they recorded in 1976 deep in the Welsh woods becomes a woefully meandering and mundane horror misfire that wastes its potential.