Jade Cocoon is the story of Levant, a young man who lives in the town of Syrus. You guide the silent protagonist on his quest to follow in his presumably dead father's footsteps to become a cocoon master. To do this, he must marry a Na'gi woman, and is betrothed to a girl named Mahbu (voiced by Michelle Ruff). On the day of a large festival in Syrus, the village is attacked by demons known as the Onibubu, which cause many villagers to fall into a deep slumber. An elderly Nagi woman, Garai, repels the Onibubu using Nagi magic before their curse affects everyone.