The unquiet dead

Years ago, the historical Marshall Street Baths in the heart of Soho were full of kids taking swimming lessons and playing in the water. Today they're crowded with addicts, homeless people and, DI Jessie Driver's new boss thinks, a teenage runaway they're trying to track. But when CID searches the decaying building, they don't find Anna Maria Klein--but they do find a man's mummified body buried in the ground in the rat-infested basement. Who was he? How long has he been there? And what happened to him?