Dr. Winifred Walker, a brilliant scientist, seeks the help of Dr. Stein to aid her Vietnam War veteran boyfriend, Eddie Turner, who lost his limbs in combat. Dr. Stein is known for his groundbreaking work in limb reattachment and human regeneration and agrees to help. Eddie undergoes a revolutionary procedure involving DNA injections and advanced surgical techniques. Unfortunately, despite Dr. Stein's best efforts, complications arise due to a jealous assistant sabotaging the experiment, leading to unexpected and horrifying transformations in Eddie's body and mind.

Eddie's physical changes turn him into a monstrous figure with superhuman strength but severe cognitive regression. As he struggles to adapt to his new existence, his inner torment grows, eventually leading him to embark on a violent rampage. The once hopeful love story between Winifred and Eddie takes a dark turn as Winifred desperately seeks a solution to reverse Eddie's condition. Meanwhile, the city faces increasing terror from Eddie's uncontrollable actions. The tale explores themes of scientific ambition, unintended consequences, and the struggles of a man left shattered by war, now grappling with a monstrous existence.