A thrilling YA historical fiction novel from internationally bestselling children's author, Anna Woltz London, September 1940. Deep in the tunnels of the Underground, hidden from the bombs, four teenagers meet. Quinn is fifteen. She’s run away from home with a bag full of jewellery and a plan to change the world. Jay has lost everything, so nothing matters to him anymore. Sebastian is Quinn's big brother but to her he no longer exists. Fourteen-year-old Ella just feels invisible. Then the tunnel comes.