Mannion assigns Debreno and new detective Olivia Cahill to work together on a missing Picasso case. They get on each other's nerves, but solve the case after Debreno makes up a theory that at first sounded too conspiracional, but turned out to be true. Meanwhile, Nancy's mom announces she's leaving her father because she found out he was cheating on her. Nancy accidentally let slip that she already knew about it and has to ask her mother to forgive her. Ella is threatened by the possibility of a breast cancer return and both Mannion and Clive offer her their full support. They look back at their best times with her and learn that Ella is cancer-free.
