For the most part of his life, Jack Anderson has been plagued by a mysterious disease that makes him a weakling and unable to live the normal life of a teenager. Over the summer, he is shipped off by his parents to a special hospital located in a remote desert-like area where he is to undergo a groundbreaking treatment. After enduring months of questionable medical experiments performed by a group of doctors who are supposed to help him get better but in reality are keeping him sick on purpose all in the name of medical research, Jack escapes from the clandestine medical facility and heads for home. While Jack was being experimented on against his will, a clone of himself named Hyde was sent to his hometown as an imposter. Enter Jack's good friend Kayle - "The Freakazoid" - and Claire - Jack's longtime girlfriend - who begin to see the chinks in facade. To complicate matters, Hyde can't stand the sight of Claire and begins to develop romantic feelings for Kayle. When Jack returns home, he comes face to face with his clone and while at first the two boys can't stand the sight of one another, they soon stumble upon the plan to destroy them both and become allies to fight for their right to co-exist.