It's back!!

Three years ago, on 1st June 2013 five teenagers named Anna,Louis,Brad,Brittany and Hazel went on a camping trip to the great Grand Canyon.From there everyone came except Brittany and later that year her dead body was found near the Grand Canyon.Police investigated and no clues were found.It was declared a murder case,Later time passed and everything got normal until this year when the group planned a reunion.After it they started experiencing paranormal activities taking place with them or around them.Is Brittany back cuz Anna saw her in the Grand Canyon.Who killed her?Is it a ghost of her?Did something terrible happened to her?IS IT BACK???