Afer Dr. Erin Gilbert is disgraced at a job interview for her belief in ghosts, she is roped by her former colleague Abby Yets and Abby's new co-worker, Jillian Holtzmann, into investigating a haunting. The three scientists soon discover that some specters do far more than go bump in the night.
MTA employee Patty Tolan finds that New York City's subway tunnels are becoming a hive of ghostly apparitions. She calls on Erin, Abby, and Jillian to investigate, revealing that paranormal activity across New York City is swiftly becoming a disaster of nearbibical proportions.
Together these four would-be paranormal investigators are determine to find out what's going on, save their city, and maybe make a profit while they're at it. The team must stop a mysterious evil, known only as Rowan, from destroying the barrier between this life and the next and turning Manhattan into a literal hellscape.