Jennifer Kent’s The Babadook is a critically acclaimed Australian horror where grief takes monstrous form. Essie Davis plays a widowed mother struggling to raise her troubled son, only to be haunted by a sinister figure from a mysterious children’s book. Blending psychological horror with motherhood and loss, the film became an instant modern classic.

Widowed mother Amelia is struggling following the violent death of her husband and her son Samuel’s fears that a monster is coming for them. When a storybook featuring the sinister Mister Babadook appears in their home, Samuel is convinced he is the monstrous creature and Amelia slowly begins to sense a very real ominous presence.

Från IMDB:
A single mother and her child fall into a deep well of paranoia when an eerie children's book titled "Mister Babadook" manifests in their home.