"The Ghostbusters have been spirited away by some dastardly demons from another dimension, leaving their rescue, and the day-to-day busting of ghosts, to the New Ghostbusters! All the while, a new god has taken notice of Earth and her chaotic presence promises unheard of catastrophe for New York City. Mass Hysteria collects the final 20 issues of the ongoing Ghostbusters series written by Erik Burnham with art by Dan Schoening, plus all of the backup stories and an art gallery. Also includes a new introduction by Dan Aykroyd!"--Page 4 of cover.