Mourning the death of his wife after a senseless and tragic accident, Boston businessman Adam Friedman finds solace through living the mitzvot--instructions for goodness, justice, and compassion. In a frenzy of good deeds, he saves lives and helps the needy. Even his adolescent daughter, whose grief is as intense as his own, begins to wonder if there isn't more than a shared joke to the superhero T-shirt she has designed for him. When a thwarted crime and a supplicant's good fortune propel Friedman into the headlines, followers gather unbidden on his doorstep. Voices, dreams, and auras visit him. Miracles occur among family, friends, and strangers alike. But while some hail the Mitzvah Man as a modern-day prophet, others brand him a madman in danger of losing custody of his only child. Is he crazy? Is he holy? Through his experiences of love and loss, beauty and pain, language and custom, Friedman's daily quest reveals the unexpected ways in which God may inhabit us all.