Zak Bagans, Nick Groff, and Aaron Goodwin of the Ghost Adventures Crew (G.A.C.) embark on their quest of the supernatural with their paranormal investigation of Bobby Mackey's Music World in Wilder, Kentucky. With a history full of murder, suicide and satanic cult activity, this nightclub has become known as "Hell's Gate."

Ghost Adventures investigate Houghton Mansion, where a tragic accident and suicide still haunt the Massachusetts mansion.

The Ghost Adventures team travels to West Palm Beach, FL, to investigate the Riddle House. Built in 1905 formerly called The Gatekeepers Cottage, the Riddle House was used as a funeral parlor and home to cemetery caretakers. Later it was used as a private residence. The house was moved from its original location, Acacia Rd, West Palm Beach, Florida. This seemed to have upset the spirits causing paranormal activity due to the house having seen its share of death and tragedy.

Zak leads the team to Birmingham, AL, to investigate Sloss Furnaces. Built in 1881, this factory was a dangerous place to work. Many workers died and many more were injured. It's the souls of these workers that are believed to inhabit and haunt the factory.

Zak, Nick and Aaron go to New Jersey to investigate an abandoned psychiatric hospital. This hospital once housed thousands of mentally ill patients, many of whom died due to poor conditions. Witnesses have reported disembodied voices and dark shadows there.

The Ghost Adventures team travels to Scotland to investigate the Edinburgh Vaults. The city is steeped in history and hauntings, but no landmark holds as many ghosts as the rooms and passageways under South Bridge.

The Ghost Adventures team heads to Boise to investigate the Old Idaho Penitentiary. The prison once housed killers destined for the gallows, and even though the criminals may be gone, their spirits remain locked behind the high stone walls of the prison.