A never-before-seen look into the real-life criminal investigations of the UK’s most talented and successful sleuths who tackle some of the UK’s most challenging criminal cases.

Having lost her job for whistle-blowing, a skilled, hardworking nurse assumes her best friend’s identity as a senior doctor to start a new life in Edinburgh.

Jenny, a single mother raising two daughters after her husband leaves, is aided by her widowed mother, Mary. But Jenny struggles to stay afloat after Mary suffers a devastating stroke…