Harley Quinn and Poison Ivy are on the run with the Floronic Man hot on their trail, desperate for Poison Ivy to understand her connection to the Green and join his new Parliament of Flowers. Knowing Gotham City isn�t the safest place for them under the new Bane order, Harley takes a hard left down a rabbit hole to seek sanctuary with a former patient and colleague, Jervis Tetch-a.k.a. the Mad Hatter-but his wonderland home isn�t all that it seems!