The Lost Treasure of the Sumerians were the legendary valuables concealed in a secret location by the Sumerians. There was said to be too much for a mortal to imagine. It was only accessible by the use of four clues, that were known by very few people. Legend said that within the treasure the Titan's Key can be found, which will give the founder access to the Hall of Ambrosia (containing Ambrosia itself) at the foot of Mount Poulis. Xena and Gabrielle teamed up with an assassin, Thersites, and a warlord, Petracles, who happens to be the ex-fiance of Xena's, to find the treasure, as they all knew the clues amongst them.