Mrs. S orders the sisters to take a night off from sleuthing to celebrate Felix's art opening. But while Felix attempts to impress a famous gallerist with the help of his sestras, Sarah remains on edge with a nagging suspicion that S is hiding something.
As Westmoreland demands a more aggressive action on Kira, and Sarah fights to save her daughter, Rachel finds a dark secret that makes her question her place within Neolution. Elsewhere: Cosima returns with a vital clue to Westmoreland's true identity.
Cosima is forced into an alliance when an old enemy returns to the island, accelerating PT Westmorland's sinister agenda. Elsewhere: on the mainland, Krystal stumbles onto a vital clue to the Neolution endgame.