A group of exceptional astronomers celebrate 50 years of friendship, embarking on a road trip through the southwestern United States, recapturing youthful adventures and recounting each other's influences on the most exciting period in astronomy’s history. Their journey through memory and the breathtaking landscape provokes them to reflect on how their profound work on the universe has reflected back on the individual, affecting their sense of religious faith, how life may have purpose, and what is knowable and unknowable.