The Things That Unite Us (2018)

When a young girl, Caroline, moves into a new house with her family, she encounters a poltergeist. This ghost is not malicious, however, but the playful soul of a 12-year-old girl named Elizabeth. The two become friends, but as Caroline grows older, their friendship runs into complications. Not all is as it seems as Elizabeth is revealed to come from a frightening, dark past, one Caroline must delve into if she's to learn the truth about Elizabeth's death.