The action of the second part of Assassin's Creed Odyssey: Legacy of the First Blade begins in Makedonia with the task of Stranger Tides. Mission begins with reaching to the ship.
Once on board you will have to go to Darius. He is waiting for you, at the top of his home in Elis.
Together with Darius, go looking for his descendant. Depending on the sex of your character it will be your son or daughter. Search for available traces on site.
After examining the traces, you and your companion will go to the next place. You will have to get rid of the guard to save Darius' descendant. After talking to your new companion, the mission will end.