At home full-time with her two-year-old son, an artist finds she is struggling. She is lonely and exhausted. She had imagined - what was it she had imagined? Her husband, always travelling for his work, calls her from faraway hotel rooms. One more toddler bedtime, and she fears she might lose her mind. Instead, quite suddenly, she starts gaining things, surprising things that happen one night when her child will not sleep. Sharper canines. Strange new patches of hair. New appetites, new instincts. And from deep within herself, a new voice.