The death of working girl Lexi, murdered by Shakiel in revenge for Spencer's stabbing, sends shock waves through Sarah's investigation and Operation Perseus. Kieran, already under pressure because wife Mary has thrown him out of their home, faces an angry Lizzie, demanding he share information about Lexi with Sarah. But Kieran is adamant: sharing information would not only alert Shakiel Oliver to the existence of Operation Perseus, it would endanger Steve's life. The pressure on Kieran is about to get worse: his wife contacts Sarah and says she has information about the Portland Tower case.