The Riddler has stolen a priceless jeweled egg, and Batman is on his trail, chasing him from Gotham to Gorilla City and points beyond. But, when he catches up with the crook, he realizes something is wrong with his old foe. The egg is possessed of some strange power that is scrambling Riddler's brain. The clue to what this is may lie in who hired Riddler to steal the egg- Vandal Savage. What does the immortal mastermind want with it? Batman's quest is like a tour of the DC Universe, spanning space and even time.