he discovers that there is a terrorist organization called the evolutionist front (ef) which is composed of yeerks and their hosts who believe that forms of biological evolution and mutation should be explored instead of the enslavement of sentient species. he encounters cassie, who is a controller and one of the leaders of the organization. she is a brutal and calculating terrorist who will use any tactics to sabotage the yeerk empire. she persuades jake to help her foil a yeerk plot to turn earth's moon into a kandrona sun, and tells him a contact will approach him with details later.