BILLINGS, Mont. (AP) — A Billings man has been sentenced to eight years in prison for attempting to purchase two women to use as sex slaves in what he called a stone dungeon in the basement of his home.

The Billings Gazette reports ( ) that Steven Currence pleaded guilty in U.S. District Court in Arizona to one count of attempted sex trafficking as part of a plea agreement with the U.S. District Attorney's office.

According to court documents, Currence met with an undercover FBI agent in Billings and showed the man his dungeon which included whips, chains and restraint devices. He told the agent he intended to buy two slaves, one to be chained to his bed and the other to be kept in the basement.

Currence traveled to Phoenix to procure the women and was arrested in 2014.