Student Laila Mahmood is drugged and assaulted by John Worboys, but her claims are dismissed by police and her case is dropped, despite the evidence of CCTV footage. Eventually, police spot a disturbing pattern.

With the help of Phillippa Kaufmann, Sarah and Laila receive documents from their original cases. After discovering that leads were botched and internal investigations have exonerated officers, they sue the Met police under the Human Rights Act. When it is announced that John Worboys, now seemingly God-fearing and penitent, is to be released on parole, Carrie spearheads a publicity campaign to force a judicial review,