Flint Calid has long been dedicated to their studies in Dental Surgery but has always held an interest in the Universal Primate Captivity Crisis and has now become committed to a missionary in the Doctors' liberation efforts. Born into the Pioneer caste of Apskellion Space Apes, Flint's colony was sacked by a faction of Zealots, and they were taken in by the Doctors when they came to help. Now, with the native primates still in captivity on Earth, Flint and the Doctors venture to fulfill the promise of release that the Homo Insipiens have reneged.