Assassin's Creed: Unity – Dead Kings

"The Dead Kings downloadable content picks up one week after Germain's death. Arno, still feeling devastated over Elise, finds refuge in Saint-Denis (at the time, known as Franciade). He is contacted by the Marquis de Sade at a tavern, who requests his help in finding the manuscript of Nicolas de Condorcet, hidden in the tomb of Louis IX beneath the city, in exchange for a ship that would take Arno to Egypt."

Source: Wikipedia, "Assassin's Creed Unity", available under the CC-BY-SA License.