Harley Quinn #21

This is the regular first-print edition (Cover A). Collect the 2 variant covers on their own pages.

Harley is challenged by Devani Kage, the second person to come back in time to kill Harley because it's believed that she will eventually kill Batman. It turns out that Red Tool was the first such person and he has his own plans. Elsewhere, Harley Sinn has kidnapped Madame Macabre and her son Mason.