Clevelapp is the first city built by The Creators, occupying the main shelf of Cabinet CLE-62 in the heart of the AMS cloud-the largest and most powerful server in the mobile app universe. The AiP and the Zirc platforms have cohabitated since the beginning, but now the AiPs are starting a battle to eliminate the Zircs and take control of the city. Billy Soarin, a young app from a misjudged family of mixed platforms, had never been interested in the feud until a failed server maintenance tragically deletes his father and many Zirc apps. He does not have time to grieve his loss, as he only has five days to beat the clock and bring his father back online-but saving him may require sacrificing all the Zircs. Billy suspects Hans Killerbee, the ruthless leader of the AiPs, may have had a hand in all the deaths, but before finding who is responsible and trying to undo his father's deletion, he must uncover the plot and save his entire platform-and perhaps all of Clevelapp-from being shut down. He needs the help of all his friends, especially Eva, who might be more than a friend, to fight Hans.