When Atlantian troops assault Metropolis as revenge for the death of their king, the Queen seeks help from the Justice League to find her son who has gone missing during the madness.

The world's finest heroes found the Justice League in order to stop an alien invasion of Earth.

The gang goes on a trip to check on Velma's younger sister, Madelyn. She's been studying stage magic at the Whirlen Merlin Magic Academy, where apparently there have been sightings of a giant griffin. The gang decides to investigate.