Dr. John Brandon, who cares for charity patients in the slums, is thrown together with writer Norma Ashley when her car strikes a boy whom Brandon treats. Under Norma's influence, and against the wishes of his friend Father Farrell, Brandon leaves the slums and becomes the partner of Dr. Thurston, who, unknown to Brandon, is Norma's fiance. Now prosperous, Brandon flies into a rage when he hears Thurston and Norma ridiculing him, and proceeds to beat Thurston and choke Norma to within an inch of her life. Taking to alcohol and drugs in his grief, Brandon becomes a derelict and goes out West to a mission town, where his loud proclamations of atheism provoke the wrath of a saloon crowd, from which his old friend Farrell rescues him. Farrell, now working in the Western parish, gradually restores the faith of Brandon, who falls in love with Mary Harrison, a blind girl who prays continually for her sight. Brandon performs an operation on Mary's eyes and her sight returns. Norma, who has found Brandon in the parish town, cannot persuade him to return to the city or to leave Mary, who accepts Brandon's love.