It is a dark time for the world in this final adventure. the epic war between man and machine reaches a thundering crescendo: the Zion military, aided by courageous civilian volunteers like Zee and the Kid, desperately battles to hold back the Sentinel invasion as the Machine army bores into their stronghold. Facing total annihilation, the citizens of the last bastion of humanity fight not only for their own lives, but for the future of mankind itself.