u/urbanplantmomma

I’m looking for a title of a serialized audio drama about a man and woman are driving across the United States when they begin receiving mysterious broadcasts through their car radio. One recurring broadcast is a charismatic preacher or cult leader addressing a congregation (as far as I remember). The radio signal grows stronger as they drive toward it, disappears, then returns later. They eventually become stranded in an abandoned place with no people, but the broadcasts continue. I remember the first season being free and later content requiring Audible or other paywalled platform. I guess I remember it correctly but not quite sure if I haven’t mixed something up. Any suggestions highly appreciated:).