The title comes from an unofficial name for San Francisco artists who recorded on various albums in 1970–1973, also known as PERRO.

"The Mountain Song" is dedicated "to David C, Jerry G, Graham N, Grace S, David F, Billy K and Mickey H and to one summer when all of our schedules almost didn't conflict," and was written during the 1970s recording sessions by Kantner and Jerry Garcia.

On the album, Kantner utilizes many of his collaborators and family members to front an extended musical trip similar to his then-recent Jefferson Starship efforts.

The insert describes a San Francisco band that develops telepathic amplification technology, which attracts the attention of various governments.

The group attempts to escape to the safety of the Australian Outback, and joins a self-sufficient settlement of over 1500 people.