Plunged into the depth of mysticism and led by the ever-beckoning finger of science, the mirage of an Eleventh Dimension is always before the old professor's eyes. His concealed laboratory is filled with the latest chemical appliances and, in spite of his daughter's pleadings, his days and most of his nights are spent vainly searching for the unknown. Betty's joy in the love of young Lloyd Chambers is interwoven with anxiety for the state of her father's mind, especially as, for some unknown reason, he disapproves of her union with her lover and at the same time countenances the suit of his elderly friend, Dr. Lovejoy. Betty having retired for the night, the old man prepares to spend the hours in his beloved experiments. The electric furnace is at white heat. All the test tubes are laid out and retorts cast their reflections around. He transfers a few drops of liquor from one tube into another and a pale blue smoke arises, a flash, and to his distorted brain appears the image of a large cat. His hoarse cry of "success at last" is heard by Betty, who has crept from her bed and now stands at the open door of the laboratory. The terrible light in his eyes tells her that his brain has at last given way, and frightened, she closes the door. Dr. Lovejoy, interested in the old man's work, to a certain point, offers to bring one of his patients for experimental work, one whose life is despaired of. However, the sight of the laboratory quenches all desire for martyrdom in the visitor and he promptly refuses to lend himself. Foiled by his departure, the professor's twisted mind prompts him to chloroform the doctor and in an unwary moment the latter is drugged and strapped to the chair. Recovering consciousness, he pleads for mercy and the professor agrees to play a game of chess, the loser to give up his life, in order that he, the professor, may prove his theory that one lives after death. Beaten in the game, the doctor cheats and the old man turns the gun on himself and fires. A moment passes and he finds that he is still alive. Quickly he grabs the paper and writes, "This proves existence after death." Meanwhile, Betty, sensing something is wrong, tells Lloyd that her father and Lovejoy have been for hours in the laboratory. The police are called and the door is burst open. The wild exclamations of triumph from the professor are cut short by the discovery that the bullet has been deflected by his watch. The fact that he was not dead, not even hurt, is a sore blow to the old man's pride, but his sorrow is short-lived, however, for the sight of his daughter being embraced by young Lloyd restores his reason.