Mud (2009)

Three levels in Sara's mind: obsessions from her past, ghosts from the present, push her towards her own inner hell. Five people in a dark, desert city, have already given up finding an answer to their situation, until a newcomer forces them to question their place and role in that world. Sara travels through a lonely landscape trying to leave her crumbling world behind, but some people from it won't let her go. A teenager Sara walks by a beach at sunset, when she steps on a red viscous substance.