
They also noted that the film was likely to have a real emotional impact on the audience.

Though the scenes are intense, in the context of the film which is looking at difficult ideas from a child character's point of view, the BBFC Compliance Officers who viewed the film suggested these ideas could be contained at 12A, where moderately intense scenes are acceptable. There are also repeated images, in dream sequences, of a collapsing building and crumbling ground which leaves the boy's mother clinging to a ledge above a chasm. There are scenes of moderate threat as a huge tree comes to life and appears to directly threaten the main character, a child. In keeping with the book, the film has several fantastical elements.

Conor finds a most unlikely ally when a monster appears at his bedroom window one night. As her condition worsens others take over his care, but he has little in common with his meddling grandmother, and his father has resettled thousands of miles away. It follows Conor, a young lad whose beloved and devoted mother is seriously ill. A Monster Calls is a British adaptation of the book of the same name by Patrick Ness, and explores the themes of bereavement and isolation.
