Mark Spence the Dean of S.O.B.E. (School Of Biblical Evangelism) encounters two atheists that were waiting for Ray Comfort and his crew to show up for some Open-Air preaching.
Mark's first heckler was Bruce who ultimately concluded that morality is decided upon by "majority rule of a society." That is the very logical equation that justified Nazi Germany during the holocaust!
Frank said morality is genetic. This logical equation makes a man like Ted Bundy or Jeffrey Dahmer justified in their actions. They were dancing to the exact tune their DNA was tuned play. By Frank's logic there wasn't really anything wrong with these men...they were just unfashionable to the times. No right, no wrong just DNA and the will to live. Frank ultimately said we need to be more opened-minded to rape...the means would justify the ends according to him.
Mark unravels this faulty logic and reveals it for what it is. Moral Relativism, a view in which there in no real right or wrong...just fashions and changes. A world in which a mother Teresa and Hitler are both validly equal in the ways they lived their lives.
The only way to justify and kind of Absolute morality (which is embedded in our thinking) is to posit a Moral Law Giver which is the very God and Designer of our God Given Conscience that works as a Moral compass...convicting us and pointing us in the direction of the Savior. The Law of God is a school master that drives us to the cross!