When Sarah moves into a new house, she befriends a group of mischievous ghosts who turn her ordinary days into a series of laughter-filled adventures.

Christina, who has a knack for stumbling upon (and solving) real-life mysteries, heads to Savannah, GA, where she and her Girl Scout friends are eager to join i

Fears of ghosts and a deadly giggling gas become a terrifying reality for millions of people threatened by the S.R.G.V.