The world is turned upside down by the seemingly impossible and horrifying murder of retro girl. Pressure is on the powers division to bring the perpetrator to Justice, but when Walker is pulled off the case for being too close to the victim, and may be a suspect himself, he must go off-the-books to avenge the woman he loved.

On the day of Retro Girl's funeral, Detectives Walker and Pilgrim prepare to combat violence between rival gangs The Quantums and The Hacks. Hoping to fill her place, Calista makes her public debut as New Retro Girl. Still reeling from Retro Girl's death, and with her murder officially closed, Walker doggedly pursues a suspect he believes to be the real murderer.

Commander Cross unofficially reopens the Retro girl case, ordering Pilgrim and Walker to lead a covert investigation that may put them in a life-threatening situation. Meanwhile, Los Angeles goes in lockdown mode as gang warfare reaches a fever pitch, pulling the revered Power, SuperShock out of retirement.

New evidence suggests the main suspect and Retro Girl's murder may be a rare power gone rogue. With contempt between the Powers Division and the FBI escalating to a breaking point, Walker attempts to gain Agent Lange's trust.

In the aftermath of a catastrophic political scandal, Walker and Pilgrim investigate a high-priority suspect and uncover shocking government connections. Meanwhile Triphammer is determined to create a new Powers team, recruiting Zora and a new protégé, Sgt. Tiberio Martinez.

The origins of SuperShock’s complicated and mysterious relationship with Retro Girl are revealed, as Calista, Sgt. Martinez and Zora team up to fill the Powers void left in her absence. The disgraced Senator Brown’s body is discovered, catapulting newly reinstated detectives, Walker and Pilgrim into the investigation.

Walker learns that something isn’t quite right with SuperShock, while Pilgrim and Kutter investigate an elusive “Ghost.” Calista’s estranged father unexpectedly comes to town.

Powers start dropping from the sky and Walker suspects an old friend is behind it. Pilgrim pursues Ghost believing he is responsible. Calista confronts SuperShock but the encounter causes her to reconsider being a power.

Powers Division and New Unity plan to capture SuperShock by using The Ghost as bait, but all does not go according to plan, and each would-be-hero must rise to the occasion or suffer the terrible consequences.