Helena and Detective Reese clash again when they both try to track down a serial killer who destroys metahumans by taking on their powers. Meanwhile, Dinah ditches school when she learns from Helena there is a metahuman-only bar, and Barbara meets Wade's parents who think she is not normal enough for their son.

Barbara and Helena learn the truth about Dinah and Dinah learns the truth about her own past when her mother, Carolyn Lance, comes to New Gotham in search of the daughter she abandoned years before. Dinah is shocked to learn that Carolyn was once Batman's protege, Black Canary. Meanwhile, Helena learns that Detective Reese has family issues of his own when he becomes secretive about a ruthless gangster.

When Helena's former classmates descend upon New Gotham for their fifth class reunion, two of the alums are brutally murdered. While Helena tries to find the killer, she fears that Reese's investigation will lead him to learn too much about her true identity.

Harley Quinn acquires the power to hypnotize others with her eyes, and persuades Helena to reveal the secrets of the Clocktower, along with Barbara's and Dinah's true identities. She soon has all the ammunition she needs to wreak havoc on The Birds as well as the rest of New Gotham.