Absentia (2011)

What it's about

Tricia's husband has been missing for seven years. Her younger sister Callie comes to live with her as the pressure mounts to finally declare him 'dead in absentia'. Tricia is reluctant, always holding out hope, but Callie is practical and wants her to move on. As Tricia sifts through the wreckage and tries to move on with her life, Callie finds herself drawn to an ominous tunnel near the house.