Planet where the pirate known as the Albino hid in a fortified compound until Dax and three Klingon warriors fulfilled their blood oath.
Secarus IV is the fourth planet of the Secarus system and the location of the fortified compound of the Albino, the pirate who killed the firstborn sons of Kang, Kor and Koloth. In Blood Oath, Kang finally tracks him to this world.
Jadzia Dax, honoring Curzon's oath, joins the three aging Klingons on their attack and devises a plan to disable the compound's energy weapons so the fighting will be hand to hand. The assault costs the lives of Koloth and Kang but ends with the Albino's death.