Mercedes Jones must confront the darkness of a past that has shaped her young life. She finds it hard to let people in and has trusted very few people. Living under the name M.J, she has been able to keep a low profile, however, she has finally found a place to call home. Enter Sam Evans, who keeps forcing her to open up and as a result, her walls are crumbling one by one.

It took 72 sessions with the Joker for Harleen to become Harley. But how exactly did it happen? The Madhouse Romance tells it all. [Joker X Harley]