The Fields (2011)

A young boy goes to live with his grandparents while his mother and father fight to save their failing marriage, and makes a horrifying discovery in the cornfield behind their house during the Manson Family trials. Warned by his grandmother to stay away from the fields, young Steven nevertheless strays into the stalks and sees something he will never forget. Meanwhile, as the nightly newscasts offer all the lurid details of the Manson murders, something begins to stir in the corn field. By the time the family dogs disappear and the threat becomes real, it's already too late to run, and Steven must face his greatest fear head on.