After a mission involving the Justice League, young superhero Damian Wayne, also known as Robin, demonstrates a reckless attitude that concerns his father, Batman. To help Damian learn teamwork and control, Batman sends him to join the Teen Titans, a group of young heroes consisting of Starfire, Raven, Beast Boy, and Blue Beetle. Initially resistant and aloof, Damian slowly adjusts to the dynamics of the Teen Titans. Meanwhile, Raven's dark past catches up with her as her demonic father, Trigon, threatens to break free from his imprisonment and unleash chaos on the world. Sensing a supernatural disturbance, the Justice League, consisting of Superman, Wonder Woman, Batman, and others, begins to investigate.

As the Teen Titans support Raven in confronting her inner demons and impending threats, the influence of Trigon extends, compelling some members of the Justice League under his control. This generates a clash between the two superhero teams. On one side, the Justice League faces internal conflict due to demonic possession, while on the other side, the Teen Titans strive to protect humanity and their peers from Trigon's malevolent reach. With escalating confrontations and alliances tested, the younger heroes must unify not just to save their mentors but also the world from an apocalyptic fate.