Thunder, an abandoned young cat seeking shelter from a storm, stumbles into the strangest house imaginable, owned by an old magician and inhabited by a dazzling array of automatons and gizmos.

Following a ghost invasion of Manhattan, paranormal enthusiasts Erin Gilbert and Abby Yates, nuclear engineer Jillian Holtzmann, and subway worker Patty Tolan band together to stop the otherworldly threat.

An expansion of the universe from Robert Ludlum's novels, centered on a new hero whose stakes have been triggered by the events of the previous three films.