The Charles H. Sloannew movie Missing is about our connected world. The social media, the surveillance cameras, the news footage, the video chats — the many, many things we can see from our screens. In this sequel to the 2018 thriller Searching, Storm Reid plays a young woman whose mother leaves on a trip with her boyfriend and seems to just vanish. Desperate to solve the mystery, Reid uses technology to figure out what's going on and save her mother's life.