Vulnerable

Newly-wed Rachel struggles to adjust to living with Sean. Admitting their marriage is over, Janet and Ade put their house on the market, planning to split when it sells. When she is called to a crime scene, Janet discovers the severed head of 75-year-old Eunice Bevan at the bottom of the stairs in her home, with her bedridden husband Joe lying upstairs. Tracing their relatives becomes crucial, but as Joe becomes more lucid in hospital, their daughter Helen's alibi starts to fall apart.