John Wayne Gacy was the model citizen. He even volunteered as a clown at the local hospital. But he kept a gruesome secret. A trail of missing young men led to Gacy's suburban Chicago home. The nation watched in horror as, one by one, the details of over 30 murders came to light as most of the victims, entombed in the crawlspace under his house, were uncovered. Based on a true story of the most prolific serial killer in American history, Gacy will leave you shocked and in disbelief.