Opening with a lone guitar line that itself has all the momentum of entire genres crammed into a single set of chords, We Were Promised Jetpacks' These Four Walls signifies a debut album that has the sort of peerlessness and potential to stand as a mainstay and luminary of indie music in the 21st century. Like fellow Scotsmen Frightened Rabbit and The Twilight Sad, We Were Promised Jetpacks bring emotional intensity to the forefront in their immensely appealing rock anthems. Adding nimble, driving rhythms and bristling tension to the mix, they unfold their songs into effortless-seeming choruses imbued with romanticism and pop sensibility.