Fifty years into the future, a young Terry McGinnis meets the aged and reclusive Bruce Wayne even as the boy's father discovers a foul secret of his corrupt employer that leads to his death.
Determined to bring his father's murderers to justice, Terry finally impulsively resorts to using Wayne's last Batsuit to investigate as the new Batman.
A new geneticist at Wayne-Powers named Dr. Stephanie Lake builds a new body for Mr. Freeze as a test for a treatment to cure Derek Powers, but it soon fails and Mr. Freeze vows revenge after Lake attempts to biopsy him.
Commissioner Barbara Gordon is determined to protect her DA husband from an elite assassin, and definitely does not want Batman, and especially Bruce Wayne's, help.
As Derek Powers' medical condition as Blight worsens, he calls his estranged son home for help. However, an enemy hidden in plain sight has other plans for him that eventually involve Batman as well.