The Secret Vow
At an exclusive English boarding school, four young girls gather in a room at night. They make a blood vow of eternal friendship. It is 1907, and in the years of tumultuous change and impending war, their lives become filled with love and loss, passion and pain, desire and desperation. But through all the time and distance that separates them, they are bound together by a shared past...until one of them betrays their secret vow...
Night Shall Overtake Us by Kate Saunders