Final issue! After a battle with the feral feline Hyena, Firestorm must take on the reawakened Multiplex. The only Professor Stein is a little inebriated and not at the top of his scientific game! Can Ronnie Raymond outthink the villain and save the day?

For the first time, the stories that introduced Firestorm are collected from issues #1-5 of his 1970s series, plus stories from THE FLASH #289-293. After Ronnie Raymond is tricked into nearly blowing up a nuclear reactor, he and Professor Martin Stein are caught in a nuclear incident. Their personalities merge, forming the being called Firestorm!