Plunged into a double murder investigation and plagued by an alibi that doesn't ring true, intuition tells DI Geraldine Steel they have the wrong man; at odds with her boss, and burdened with the return of a troubled twin sister she never knew she had, Geraldine is drowning. When she finds that her career is not the only thing threatened by the case at hand that this time, it's her life will she sink, or find the strength to pull through?