The last great adventure of the PB & J Society

When her best friend Jason's house is put up for sale, and he tells her that his family is moving to California, Annie Jenkins is devastated by the news that she is losing the other member of the PB & J Society--so when neighbor Mrs. Schuster tells her about a buried chest and gives her a map she convinces herself that this is a way for Jason's family to pay off their mortgage and stay in Utah.