Maisara, a collector of revenue for Haschem, the caliph, wrongs a widow. She appeals to the caliph, and he orders that Maisara shall repay her a hundredfold and lose his place. Vowing vengeance, Maisara seeks his kinsmen, the tribal spirit being an Arabian characteristic. They counsel with him. and decide that Maisara shall send his daughter, Amina, to the caliph as a peace offering, but in reality that she may assassinate him. She falls in love with Haschem and fails to redeem her promise. Maisara warns her that unless she carries out the undertaking he will do so himself. She throws the dagger from her and this is taken to Maisara by Zied, his cousin. Under pretense of seeing Amina, Maisara gains entrance to the harem, where Haschem is not closely guarded, and where the blow can be struck before help can be summoned. Amina is horror-stricken at his appearance. Her distress is secretly observed by Haschem, who is on guard against the treachery, and takes the dagger from Maisara. On Amina’s plea, Maisara’s life is saved, and Amina finds happiness in the arms of the caliph.