There, on the dusty floorboards, was a piece of paper, folded neatly. A newspaper article, written in German, alongside a faded picture of two men in Nazi uniforms staring at the camera. I was about to place it back in the box of forgotten things when something in the text jumped out at me. My breath caught in my chest. I know that name. London, present day. Isla has grown up hearing her beloved grandad's stories about his life as a child in pre-war Poland and as a young soldier bravely fighting the Germans to protect his people. So she is shocked and heartbroken to find, while collecting photos for his 95th birthday celebration, a picture of her dear grandfather wearing a Nazi uniform. Is everything she thought she knew about him a lie? Unable to question him due to his advanced dementia, Isla wraps herself in her rainbow-coloured scarf, a memento of his from the war, and begins to hunt for the truth behind the photograph. What she uncovers is more shocking than she could have ever anticipated - a tale of childhood sweethearts torn apart by family duty, and how one young man risked his life, his love and the respect of his own people, to secretly fight for justice from inside the heart of the enemy itself...