One day when heavy rains force them to play inside, Yakari and Rainbow are startled by a strange sound. To their amazement, it's followed by their whole tipi suddenly taking off and flying straight north, with them inside! After several hours of a not entirely pleasant journey, they're greeted on landing by Rainbow's spirit guide Nanabozho, the Great Rabbit, who wants them to meet the inhabitants of the great north. Among those is a mysterious white bird ...