The Batman & Scooby-Doo Mysteries #4

With Batman on an undercover mission, Nightwing and Batgirl are left to protect Gotham City. When a \"Monster Insurance\" protection racket begins to threaten the city merchants, the younger bats press Mystery Inc. into service to assist in rooting out the perpetrators. The trail quickly leads to Black Mask and his False Face Society. But how will Black Mask make good on his threat to unleash a pack of monsters on the city during the annual Seaside Spectacle Parade, and how to differentiate the villainous legions of the False Face Society from the huge crowd of ordinary masked parade revelers?