Blind Ambrose North is tormented by the suspicion that his wife Constance committed suicide when their crippled daughter Barbara was only two, because she did not love him. Before her death, Constance wrote Barbara a letter to be opened on the girl's twenty-first birthday, but when Barbara opens it and learns that her mother killed herself to escape a doomed love affair with Lawrence Austin, she invents a different story for Ambrose, knowing that the truth would hurt him too deeply.

George Cross, a junior partner in the advertising agency of Nigh and Cross, goes to his office one evening to get a plate for a newspaper and surprises Allan Nigh, his partner's son, who has been distributing a leaflet exposing the lies of the advertising firm. Rosie, a member of the "Truth Society" to which Allan belongs, is hiding in the next room. George sends Allan to the newspaper office and then discovers Rosie. Shortly thereafter, Nigh and his daughter Ann, who is also Allan's sweetheart, arrive and George lies his way out of a compromising situation. Soon after, a detective arrives to investigate a front-page exposé on the circulars that Allan has written. When the advertisers realize that the exposé is actually the best campaign ever conceived, the supposed detective offers Allan a tremendous salary to write ads for him, Rosie reveals herself as a reporter from the Journal and Allan and Ann reconcile.