A progressive New York couple with an autistic son move to a bucolic Hudson Valley exurb and immerse themselves in the local community only to have their bond tested by an invitation to become an open-marriage couple.

Shantae is shocked when her faithful husband, Dr. Dorian Graham, asks to celebrate their first anniversary by spending a no-questions-asked, no-consequences night with their greatest temptation and begins an affair with her gorgeous, uninhibited younger sister.