Behind the Wall full movie online on FMovies. In this chilling, atmospheric thriller, Katelyn (Lindy Booth) seeks answers about the brutal murder that claimed her mother's life 20 years ago in the lighthouse where they lived, a crime for which her grief-and-guilt-crazed father has long held the blame. When developers descend on the abandoned lighthouse and begin to vanish mysteriously, Katelyn comes face-to-face with the evil haunts the family's former abode.