Harley Quinn is released back into society, proved to be sane. After a misunderstanding at a clothing store, however, a snowball of comedic chaos builds around her.

While Bruce is in Europe on a Wayne Enterprises business trip, the theft of a jade cat statue occurs at Gotham State University. Barbara Gordon again becomes Batgirl to investigate, only to run into Catwoman, who is also investigating, pointing out that the acid residue used to destroy the security system is not her style. The two team up to find the statue, with Robin tailing them, and things go from bad to worse when Roland Daggett is revealed to be involved.