Nani is a flower decorator, madly in love with his neighbor Bindhu. He gets killed by the baddie, Sudeep, a powerful businessman. Nani comes back as a housefly to get his revenge.

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.