In America professional wrestling is a popular form of sports entertainment. Louis Theroux meets veteran wrestlers and those making their debut, and attends an event organised by the most extreme wrestling federation. There's clearly a lot of theatre, make-up and choreography involved, as well as some barbed wire.
He also visits the WCW Power Plant, a training facility where some of the WCW wrestlers started out. The training he receives there from Dwayne Bruce shows him that some wrestlers will not break kayfabe (the illusion of fiction being fact) and will take exception when their profession's authenticity is questioned.