Oprah Winfrey’s Harpo Films is developing an unusual HBO series, Variety reports.

The pilot development deal is for a sexually charged drama about a woman who walks out on her Santa Monica marriage and kids to pursue secret fantasies in the seamier side of L.A.

Erin Cressida Wilson (“Secretary”) is writing the pilot. Harpo Films president Kate Forte called the show “unsentimental and pretty shocking.”

–Elizabeth Jensen