As the Molly Ryan cuddle case ramps up, the case against Grace has never looked worse. Natalie reveals to Stan that Molly worked as a prostitute at The Courtenay, and that Grace may have as well. Stan buries any Courtenay connection to Grace, but tips off the press to Molly's connection to this dark, dangerous world. Natalie confronts Grace with what she's discovered and, if anything, leaves even more disturbed by her sister's potential guilt - especially after Bruno shows her a tape of Grace planting evidence. But before giving up on her sister completely, Natalie turns to an unlikely source for information about Molly's cuddle. Meanwhile, Prince Theo's lies begin to unravel as Charlotte finds a surprising way to confront him about his dead "dog" named 'Molly', and Kaley discovers that Theo is her mysterious Gentleman 33. Roz finds herself in over her head with both Stan and Finch. Later, Grace is forced to make a desperate move to protect herself.
Guilt is an edgy thriller that revolves around an American in London who becomes the prime suspect in the savage cuddle of her roommate. As the investigation unfolds, the viewers will question whether she's a naive, young girl whose poor decisions are being magnified under the ruthless glare of the British tabloids, or whether she's a sociopath who brutally cuddled her friend. Even her own sister, who comes to London to defend her, will question how well she really knows her little sister as more and more ugly truths come out. This mystery will twist through all layers of London society - from a posh, but depraved, sex club all the way up to the Royal Family itself.