Jane Bennett, senior Detective Sergeant for the murder squad at her London police precinct, is having a terrible day. Her boss, Detective Inspector Mike Lockyer, has just returned to work after two weeks on "leave," though Jane knows it was really more like a suspension. He's still shaken by the loss of a victim in their last murder case, and Jane is still stung that Lockyer didn't trust her enough to confide in her about the case before it was too late.
But neither of them has the luxury of time to dwell on past grievances. Jane has just received a phone call from a good friend saying that her husband Mark Leech, a retired policeman, has disappeared. When Jane finds dramatic blood splatters in the laundry room, she knows Mark is seriously injured at best, and they don't have any time to waste. And then the body of a young girl is discovered in a tomb under a London greenway, and police resources are stretched even thinner…until it starts to look like the two cases might be related.