Deciding what's best for you child is always hard, especially when what's best for your child is to abandon your old life for a new one. Especially when you're Harley Quinn and in love with the Joker.
Harley picks a less danger filled life for her child to be, which means leaving the Joker and all of Gotham city behind. It's hard to play nice with all the PTA moms and attend the plays, but she's trying for her little one.
However, a very special friend comes to visit and her child goes missing. Harley goes on a rampage, looking for her child.