Thale (2012)

Estranged friends Leo (a crime-scene cleaner) and hired-hand Elvis are cleaning up a particularly messy casualty deep in the Norwegian woods. When Elvis accidentally finds a secret passage that leads to a subterranean living space, he also encounters Thale, a beautiful young woman who sings, but does not speak. Though they are intrigued and concerned for her, they are ill-prepared when others, tracking Thale, finally catch up to her.