In a world where mysterious plants are spreading all over the earth, emitting toxic spores as they grow, a small group of survivors seeks shelter on the back of a giant, wandering creature they call 'Onbu'. Become their leader, build their settlement and form a symbiotic relationship with Onbu to survive together in this hostile, yet beautiful post-apocalyptic world. New to this release is the all-new Story Mode! Let Onbu take you on an epic journey as you learn more about the world and its inhabitants. Meet a cast of memorable characters, each doing their best to survive in the wilds. Will you persevere and uncover the source of the infestation?