Batman: Harley and Ivy (2004)
Issue #1
A snafu by Harley sends Poison Ivy back to Arkham, and Ivy swears off working with Harley forever. But Harley won't take no for an answer, so when Ivy breaks out and heads to South America, Harley's right behind her. Oily politicians, cutthroat mercenaries, and shower scenes abound!