On a bright spring day in London, Ria Driver sees a face she never thought she'd see again. Coincidence? Or her past coming back to haunt her? Suddenly, Ria is plunged back almost 30 years, to the time she spent as Supervisor at the Convent of Maria Goretti, a rural Irish boarding school. And although she has tried her best to forget, the memories come flooding back. Cold, darkness, isolation, loss, fear. Fear of the sadistic Mother Benedicta and her cruel punishments. And fear of the noises - the humming, the footsteps, the knocking. What was the cause of the sounds from the attic? And who was the child who should not have been there? As events unfold, Ria realises that she can leave the past behind no longer, that her story needs an ending. And to find it, she must go back to where she swore she'd never go again.