In April of 1997, Tristan Broder, gay, widowed, and balding, makes a pilgrimage of sorts from San Francisco to the prickly desert and scalped mountains around Tucson, Arizona, the place where he helped bury his partner Joe five years before. Guided by a comet that crossed the spring sky that year, he wanders toward a world of renewal and resurrection, unending, unlooked for -- and sometimes, even unwanted.