In his quiet, solitary life, the most exciting thing Osker does day to day is forage for mushrooms outside his secluded village. When he encounters an unlikely visitor and meets the very eccentric shaman, Ryka, he is thrown into a world of calamity, misadventure, and chaos. CMAO is a sci-fi/fantasy and action-adventure story of a futuristic Earth that was ravaged by a cataclysm, and the strange life forms that prospered after.