The Arbor tree is capable of subjugating an entire city, giving people both limitless opportunities and opening the door to a dark, unprecedented world. Jessica Hayden chases an elusive killer and ends up in Hecate City, where the first tests of a new tree begin. Alfred Lindahl, trying to remember who he really is, participates in testing a new virtual reality game, the true purpose of which he does not even know. Updated to version 2.1, Jack Fowl continues to explore the dark side of the city of Zero and faces a new mysterious enemy. The fates of all these people are closely intertwined with the desire of two neighboring cities to seize power on foreign territory. There can be no winners in this fight, and only those who can survive to the end will understand how meaningless it all was.