Skyland Season 2 Episode 2 The Book of the Worlds

While out on a routine mission, Mahad and Lena are visited by a ghost ship that contains clues about an ancient map of the entire expanse of the Archipelago. With the help of the Vector they go to Venice to find the mysterious map. They find a "haunted" palace inhabited by the mysterious Countess Kondratti. The Countess holds many secrets most importantly the precise location of the map which is hidden within a gigantic library. Oslo learns of their scheme and launches an all out assault to obtain the priceless map first before Lena and Mahad have the chance to learn the location of Kharzem Prison.