According to reports, Glenn Manning, also known as "The Amazing Colossal Man," was presumed dead after plunging from the Hoover Dam. However, he has now resurfaced in rural Mexico, but with severe brain damage, disfigurement, and a ravenous appetite. The film, directed by Bert I. Gordon with writing credits from Bert I. Gordon and George Worthing Yates, stars Sally Fraser, Roger Pace, and Duncan "Dean" Parkin.