Natural-born mimic Glory Quayle leaves her country home, reaches London, goes on the stage, and gains fame and affluence. Her country sweetheart John Storm, believing he has lost Glory forever, enters a monastery, tries to forget her, cannot kill his love, returns to the world, and becomes a famous slum worker and friend of the poor. Social vampire Lord Robert Ure, a beast in human form, betrays Glory's chum Polly Love. Glory tells John of Lord Robert's wicked treatment of poor Polly. John demands that Lord Robert marry Polly to save her from dishonor. Lord Robert refuses, as he intends to marry a rich American heiress, and a terrific clash erupts between the Right of John and the Might of Lord Robert. John exposes Lord Robert, who swears revenge. Polly dies of shame and a broken heart. Lord Robert plans fiendish revenge on John. He broadcasts the report that John predicts the end of the world on Derby Day, the greatest day of sport in England. John becomes an object of hatred. All Britain wrought up by John's alleged prediction. His former friends become bitter foes. The uneducated and weak are in mortal fear. Thousands and thousands incite riots against John Widespread and awful panics in the slums. Derby Day becomes a day of terror. (Wonderful scenes of the world-famous Derby Race, with its great horses and its terrific crowds, taken in England especially for these scenes.) John is a target for the vengeance of everyone, both rich and poor. He stands alone, with all the world against him. Glory rushes to his aid, quells the angry hordes and saves him from them. Through persecution, John's mind becomes unbalanced. That night, fearful for Glory, John goes to her home, tries to kill her to save her from a fate like the one which befell poor Polly. Glory rises supreme makes a magnificent defense, recalls John to his senses, helps establish his innocence, proves Lord Robert's guilt, accepts John's love, joins him for life, be it better or worse and in spite of the terror, the deep disappointment, the tribulations, the misunderstandings, in spite of all, Glory and John find happiness in each other's love.