As Emily's blackouts grow increasingly violent, her only hope lies with the person she betrayed most, while Victoria makes a drastic move to deal with someone from her past.
As the notorious Pascal LeMarchal's unexpected visit reverberates throughout the Hamptons, Emily and Victoria go head to head in a very public showdown.
Emily and Aiden visit his mom to find any clues to link Pascal to his father's death. Meanwhile Victoria pays a trip to Mason in jail to get his alliance against Emily.
As Emily plans to host her most surprising party ever, Victoria finds a way to turn her greatest setback into a dangerous advantage. Meanwhile, unbeknownst to them both, David Clarke plans his next move.
Daniel decides to confront Emily about the secrets she has kept; things get hotter between Margaux and Louise; Emily investigates her father's claims; Victoria struggles desperately to keep David on her side.