In this provocative mystery from beloved crime writer Denise Mina, new evidence in an old murder case forces one woman to make an impossible choice.

A year ago, a father and his fiancée were brutally murdered in their opulent London townhouse, sparking the most high-profile murder investigation in recent history. Blood spatter expert Doctor Claudia O'Sheil's evidence put the killer behind bars--or so everyone believes. But since the trial, Claudia's learned a horrific truth. Her evidence and her testimony were wrong. And someone she knows made sure of it.

Now, as she takes the stage before the elite of London to give a career-defining speech, Claudia faces a devastating choice. Protect her children and her career with her continued complicity, or blow the whole conspiracy apart and reveal the truth: not only is the real murderer still out there, but they're in the audience. And they'll do anything to keep their secrets buried - including burying Claudia with them.

As Claudia steps toward the microphone, she's desperately revisits that fateful night. What really happened? And what speech will Claudia give?