The book God in a Brothel recounts the stories of investigator Dan Walker's ministry to infiltrate brothels and free young women and children trapped in sex trafficking. Unfortunately, as he became more involved in this ministry, Walker became captivated not by God's calling but by the work itself. Eventually, Walker would commit a sexual sin, but prior to his fall into sin, Walker describes how the "high" and burden of ministry took over his life.

The adrenaline that pulsed through my veins during a rescue operation was more powerful and addictive than any extreme sport or self-induced high. The thrill … and the deep satisfaction that came with seeing a victim walk free from bondage and fear was exhilarating, and I had never been so alive.

It should come as no surprise, then, that as time passed and I completed more missions, I started to change. This was not noticeable to me at the time, and I was only dimly aware of a growing distance between me and those around me …. Having witnessed firsthand the horror of the sex trade and knowing how relatively easy it was to do something about it, I became even more eager to return to the front lines and rescue those I knew were still enslaved. In some cases the names and the faces of the victims began to haunt me, and I increasingly felt the burden of responsibility to go back for them …. I began to feel the weight of the world on my shoulders and even came to believe that if I were not successful in my missions, then the victims concerned would never be rescued. If I did not go back for them, they would remain there forever.

I was finding it harder and harder to relax and come down from the state of hypervigilance that my work required. These small but significant changes were the tip of an iceberg that was growing largely undetected beneath the surface of my life. And like any undetected iceberg, it was to become very dangerous.