In the lake of one of parks of London, under the layer of ice, the body of woman is found. A detective Erica Фостер takes up investigation. For a victim, young society lioness, was, seemed, ideal life. But Erica discovers that this crime conduces to three girls that were before found smothered and bound in the reservoirs of London.That is it a coincidence or matter of hands of serial maniac? While Erica conducts business, to her all nearer and nearer a pitiless killer sneaks up. Besides her career hangs by a hair - on the last investigation that was headed by Erica, her husband and part of command perished, - and she must battle not only with the personal demons but also with a killer more dangerous, than all, with whom she clashed before. Will she manage to get to him before he will inflict a new blow? And who that, who watches after her?