Deeper: The Retribution of Beth (2014)

Mark, a journalist, is sent to do an article about porn makers Steve and John. They decide to take Mark on a ride that, unbeknownst to them, turns into a vicious nightmare. Caught in a revenge plot that's been brewing for years, Mark tries to escape as mysterious Beth reigns down punishment for Steve and John's past dirty deeds. What is a "just" consequence for a couple of scumbags?