When Scarecrow unleashes his fear gas, Batman, Robin, and the Mystery Inc. gang find themselves battling phantoms conjured from their own minds. The Dynamic Duo and their mystery-solving friends are trapped in a world of their worst nightmares, with only Scooby-Doo and Ace the Bat-Hound able to navigate the chaos. The gas affects only humans, leaving the canine companions to find a way to overcome Scarecrow's psychological assault and save their human allies from their own imaginations.

This crossover event is celebrated for its playful blend of iconic superheroes and beloved cartoon characters. The premise of Batman and Scooby-Doo facing off against a villain who weaponizes imagination offers a unique narrative challenge. Critics and readers alike have noted the clever way the story balances the darker elements of Scarecrow's powers with the lighthearted tone of the Scooby-Doo universe. The inclusion of Ace the Bat-Hound alongside Scooby-Doo adds an extra layer of canine charm to the heroic efforts.