Bruce Wayne discovers he has a son named Damian, raised in secret by the League of Assassins. Following an attack on the League's headquarters led by the ruthless mercenary Deathstroke, Damian and his mother Talia al Ghul seek refuge in Gotham. Talia reveals Damian's parentage and leaves him in Bruce's care, hoping the boy can learn the ways of his father and Batman instead of following the blood-soaked path Talia and her father, Ra's al Ghul, had set for him. Despite an initial rebellious attitude and a deep-seated urge for vengeance against Deathstroke, Damian gradually starts to adjust to life in Wayne Manor.

As Batman tries to mentor his son, he realizes that balancing Damian's violent inclinations with the ethics of being a superhero presents a significant challenge. Together, they track down the masterminds behind the attack on the League of Assassins while also dealing with an uprising within Wayne Enterprises. The narrative showcases the evolving relationship between Bruce and Damian, testing their abilities to work as a team against formidable adversaries. As father and son navigate their complex bond, they must confront various threats jeopardizing their family legacy and Gotham City's safety.