As you saw above, Come Play tells the story of young Oliver (Azhy Robertson,) a boy with non-verbal autism who feels lonely in the world. Eager for a friend, his wishes are soon answered when a mysterious presence starts to talk to him through electronics. However, it isn’t long before Oliver and his parents (Gillian Jacobs John Gallagher, Jr.) start to realize that this “friend,” named Larry, is something much more sinister than they’d ever imagined.
Article source: https://www.cinemablend.com/news/2553415/come-play-trailer-new-horror-movie-mixes-monsters-and-technology-to-scary-results