Detective Comics #6

"Batman invades The Penguin's floating casino as Bruce Wayne to uncover a brutal string of slayings - but he finds the chips stacked against him! With the Iceberg's maiden voyage out of Gotham Harbor under way, the evening's festivities threaten to throw Batman off the killer's trail. And lurking among the rich and famous is a very ambitious outsider who'd like nothing more than to see Bruce Wayne lose everything, including his life. Murder, lies and betrayal are the name of this high-stakes game!"