A stalled married couple, Chris and Sylvere, temporarily relocates from New York City to Marfa, Texas. Tensions rise when the couple spends an evening with celebrated artist and mysterious cowboy, Dick, launching them into an unusual sexual fantasy.

Chris's growing obsession becomes a fun and fuelled marital pastime.

Sylvere demands Chris undo the damage she's done though it may be too late. Chris's letters bring Devon and Toby together. Determined to clear the air, Chris and Sylvere devise a plan.

Chris and Sylvere proceed with their questionable scheme but Dick throws them for a loop that their marriage can't handle. Toby and Devon go their own way.

After a grand gesture, Chris grapples with a Dick-less existence. Toby goes viral with a provocative project that Devon takes issue with. Pushed beyond their limits, Dick and Sylvere broker an unlikely truce.

Dick questions his role at the Institute, creating new opportunity for Paula. Toby sets boundaries and Devon takes her work in a new direction. Chris and Sylvere come to an impasse.

Sylvere writes his own letter while Chris explores a new reality with Dick. Devon's performance awakens the people of Marfa.