Artist and young mother Sandra Gilles disappears without trace after leaving her three-year-old daughter, Charlotte, with a friend. Her lawyer husband, Naz Malik, is devastated – but he's also the prime suspect in a murder investigation. When Naz vanishes shortly afterwards, Gemma James and her partner Superintendent Duncan Kincaid agree to work together to solve the case before the murderer can get his hands on the real prize; Charlotte…