Joy Unspeakable is an ethnographic film that examines the question, what does it mean to be Pentecostal, through the documentation of three types of Oneness Pentecostal services in Southern Indiana: a gospel-rock concert, a regular Sunday service, and a camp meeting. Religious behavior, doctrine, and social values are discussed by several Oneness Pentecostal church members and ministers in interviews interspersed with footage of the various services.