Seventeen years have passed since the events of the first game. Durandal sends the player and an army of ex-colonists to search the ruins of Lh'owon, the S'pht homeworld. He does not mention what information he is looking for, although he does let it slip that the Pfhor are planning to attack Earth, and that being on Lh'owon may stall their advance. Marathon 2 brings many elements to the game that can be considered staples of the series such as: a Lh'owon-native species known as F'lickta, the mention of an ancient and mysterious race of advanced aliens called the Jjaro, and a clan of S'pht that avoided enslavement by the Pfhor - the S'pht'Kr. At the climax of the game, the Security Officer activates Thoth, an ancient Jjaro AI. Thoth then contacts the S'Pht'Kr, who in turn destroy the Pfhor armada.