Max, who lives with his grandparents, discovers a kid he remembers from daycare, has moved in with his mother, His name is Kevin, but he is called Freak as well. They meet and become friends.
The two go to the fireworks by the millpond and get chased by Tony D. and his gang. They get stuck in the millpond and Kevin calls a police car driving by. They get rescued and Kevin declares them as Freak The Mighty.
They find an old purse in a drain and find out it belongs to someone named Loretta Lee. They go to her house to return it and get forced in by Loretta and Iggy Lee. The two apparently know Max's father and hints at him being paroled.
Max gets kidnapped by his dad who was let out of jail. He gets taken to a burned out building and into the basement of that house. He is then saved by Kevin after he threatens Max's dad with "sulfuric acid".
Kevin has a seizure on his birthday and gets sent to hospital. Max finds out that he passed away after entering the hospital when he wasn't supposed to.
Max becomes depressed after Kevin's death. He finds out that Gwen has moved again. He remembers the blank book that Kevin gave him and wrote down all their adventures.