The Four Clans are finally at peace. The Dark Forest has been defeated. The lake is once again peaceful. Or is it? Jayfeather receives a sign of a new prophecy. A prophecy that could lead to the end of the Four Clans. But it makes no sense, and there are new cats in the forest. Strange, mysterious cats... Meanwhile at Camp Half-Blood, Annabeth has gone missing. Percy is worried out of his mind and refuses to quit looking. Until he falls asleep and dreams of a new prophecy himself... Warrior Cat-Percy Jackson/Heroes of Olympus cross over. Set after the Last Hope and The Blood of Olympus. (Spoilers to those who have not read either. You have been warned)