Jefferson Pierce is a man wrestling with a secret. As the father of Anissa and Jennifer, and principal of a charter high school that also serves as a safe-haven for young people in a neighborhood overrun by gang violence, he is a hero in his community. Nine years ago, Pierce was a hero of a different sort. Gifted with the superhuman power to harness and control electricity, he used those powers to keep his hometown streets safe as the masked vigilante Black Lightning, but he left the Superhero days behind. Almost a decade later, Pierce’s crime-fighting days are long behind him…or so he thought.
As the community struggles with the violence surrounding them, a glimmer of hope appears: Is Black Lightning back? Lynn Stewart, noticing the changes in the community, is also left wondering. While Jefferson Pierce struggles with his decision, Gambi urges him to take up the mantle once more and return to life as Black Lightning. Anissa and Jennifer try to deal with the aftermath of their jolting experience.
Jefferson Pierce and his family may have survived Tobias’s attack, but they’re not out of the woods yet. Concerned for the safety of Garfield’s students, the board considers a motion to shut down the school. Jennifer struggles with her powers and her actions have unforeseen repercussions. Meanwhile, Anissa finds a new way to give back to Freeland.
Black Lightning and Thunder return to South Freeland in an attempt to figure out what is going on. When they arrive, they are directed to a nearby wood where they are surrounded by a clan of mixed-race moonshiners called the Perdi. Meanwhile, Lynn, feeling tremendous guilt, falls into a deep depression. Lastly, Tobias finds that his plan is falling apart.
Lynn counsels former pod kid, Wendy, in how to live in a world that's new to her, but the fate of the other pod kids remains in doubt. Meanwhile, Anissa figures out Grace's secret. Lastly, Jefferson tries to install a superhero code for his metahuman offspring, but Jennifer insists on taking revenge on Tobias for her boyfriend's death.
We find Jefferson Pierce like never before, in the hands of the ASA with his wife Lynn as Agent Odell tightens his grip on the Pierce family, leaving Jennifer abandoned and Freeland without Black Lightning and Thunder. But Anissa secretly defies Odell in her alter ego as Blackbird with the able tactical and technical support of Gambi.
After four seasons, the game-changing, relevant and electrifying series comes to an end. Gambi and the rest of the Pierce family have been informed on what happened to Jefferson as Gambi managed to locate the Emitter in the Tori Mausoleum. He, Thunder, and Grace head there in an effort to destroy but must fight through the Drakestone security team guarding it to accomplish the goal.