In the vibrant, bohemian neighborhood of South Philadelphia, 50,000-square feet of concrete are covered with tile and mirrors -- mosaics that were created by Isaiah Zagar, an eccentric, tormented artist. The murals chronicle his love for his wife, Julia, and subtly hint at the darker corners of an extraordinary imagination. Where Isaiah is obsessive and narcissistic -- a former Peace Corps volunteer who has become an icon in South Philly's art community -- Julia is gracious and warm. For decades, their opposing natures complemented one another perfectly. But suddenly the family is torn apart at the seams; a few hours before picking up his oldest son from rehab, Isaiah confesses to an affair with his assistant, is kicked out of the house, and spirals into a debilitating, suicidal depression.