The Babadook (2014)

Amelia lost her husband on the way to give birth to Samuel and she struggles to raise her young son as a single mom. When Samuel reads about a scary monster in a mysterious pop-up book, as Amelia's mental state deteriorates, the line between reality and delusion becomes blurred and they found themself haunted by “The Babadook”. Showing how grief can haunt us, this story is praised for its atmospheric tension and psychological horror.