According to The Nightbreed Chronicles, Kinski fell in love with a woman but was rejected for his looks. In an effort to win her over, he took Saint-Victor's compound, a drug which allowed the user to reconfigure their looks with the power of their imagination.
However, Saint-Victor's compound caused Kinski to become disoriented. While in his fugue state, he found himself staring at the crescent moon in the night sky, which changed his facial features to reflect what he was looking at.
Upon gaining consciousness once more, Kinski attempted to commit suicide by throwing himself in the Seine. He claims he died and rose to the surface with the moon the following night.