A crack has appeared about 1 from from the ceiling around the entire room. I believe the walls are plaster. What does this indicate and who should I contact to repair?

Could be many things i.e. wood lath, poorly filled gap at ceiling ,or separating drywall tape,call drywall or plaster guy for repair

Hi, sonniecoleman!

Is there anything stored in the area above the ceiling, please?

Thanks!