Fifteen-year-old Harleen Quinzel is sent to live in Gotham, and there she is introduced to the drag queen Mama who agrees to take her in. Harleen meets her new best friend Ivy at Gotham High School who is a social justice warrior fighting against persecution, and when Mama's drag show becomes the latest victim of the city's new push at gentrification, Harleen and Ivy take different paths to protest. Ever the rebel, Harleen must decide if she should mute her more violent tendencies and join Ivy or succumb to temptation and join the Joker in his quest to take down Gotham's most powerful corporations.