Juliet’s night-time secret forces her into a dangerous lie, and Lorna confronts the past she has been hiding from Grace. The girls ramp up the app with shocking results, and Iris is missing. Gigi hosts an event that takes a dark turn when the police show up.

As the police hunt for Iris, the mothers refuse to listen to Lorna’s concerns about what the girls are up to. Juliet falls out with Lorna and gets closer to an enigmatic Gigi, while Allegra does a secret deal with K Rizz. The app gets more dangerous, with serious consequences as a photo circulates.

Lorna fights to get Grace back into school, whilst news of explicit photos on the internet shocks the community. Allegra tries to help Grace, but her plan backfires. The parents have a showdown at a wild party hosted by Gigi, where dark forces are at play. And tragedy strikes Richford Lake.

The town comes together in the wake of tragedy. As Grace and Allegra are questioned, will mothers and daughters lie to protect themselves? Lorna and Steven become closer when she finally reveals the truth of her past, but Juliet’s life falls apart when Gigi comes to dinner.

The net closes in on Grace and Allegra, while Juliet and Lorna make a shocking discovery. Gigi’s secret is blown, and at Frances’s party, the terrible truth is finally revealed.