Slick, an evil meta-human who can turn from solid to liquid, is hired by Dr. Quinzel to kill the honest cops who stand in her way. When Reese is the next intended victim, Helena comes to his aid and their mutual attraction continues to grow. Meanwhile, Barbara believes Dinah's story that she's just a runaway, but Helena remains suspicious.

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 a hit is put out on the life of legendary mob boss, Al Hawke, the only person he trusts to protect him is his son, Detective Reese. Reese turns to Helena for help, but when she learns that Reese's father is the same man who killed Dinah's mother, Black Canary, her loyalties are tested.

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.