Young Theresa is favored in the love of Guido, leader of the colony. The day of the wedding is set when the youthful Angelo arrives from overseas. He meets Theresa, and for the first time love enters the girl's life. But she remembers her vows to Guido, and shuns Angelo until love proves too strong for her. Guido has been made the recipient of a fearful trust by some conspirators who need a hiding place for their bomb. When he becomes aware of Theresa's love for Angelo, he deems life empty and prepares to die. A death feast is spread in his cabin and the fuse of the bomb connected with an electric circuit operated by an alarm clock. But in the midst of these preparations Guido reflects: "Why should I die for his happiness?" and a great wave of hatred sweeps over him. He inveigles Angelo to the cabin, pretending to wish him joy in a wedding feast, and locks him in with the bomb. But Theresa, fearing Guido's vengeful spirit, comes on the scene and after a struggle with the man who is not worthy of her love, rescues her lover just as the bomb explodes and hurls Guido into eternity.
—Moving Picture World synopsis