Batman totally doesn’t support this desperate search, but he joins up to help Jason anyway. Long story short, Jason finds his biological mom and believes she is in danger from the Joker. In attempting to save her – defying Batman’s orders – Jason confronts the Joker. Jason’s mom, however, is actually working for the Joker, and Jason is trapped. The Joker beats him violently with a crowbar, leaves Jason at the brink of death, and then blows up the building, with Jason and his mom inside.