A dark mentorship forms between Deborah Vance, a legendary Las Vegas comic, and an entitled, outcast 25-year-old comedy writer.

The dark mentorship between legendary Las Vegas comedian Deborah Vance and her young, entitled writer Ava continues to evolve as the two travel across the country workshopping Deborah’s new stand-up act.

A year after parting, Deborah Vance is riding high off the success of her standup special while Ava pursues new opportunities back in Los Angeles.

In season 4, tensions rise as Deborah and Ava endeavor to get their late night show off the ground and make history doing it.