A sunset wedding in Kona. An ugly secret discovered on an iPhone. Experimental philosophical marriage counseling. Time travel. Diver Neurons and Angel Neurons separated by Sea and Sky. Banshee and the Sperm Whale takes the reader on a journey into the unconscious mind of Martin, a biracial chef from Denver who suffers from a particular kind of overabundance. Along the way, a modern allegory unfolds, and everyday notions about self-knowledge, the nature of good and evil, and possibility of finding meaning and spiritual significance in the face of inexorable uncertainty are turned inside-out.