The Keeper tells the incredible true story of Bert Trautmann, a German soldier and prisoner of war who, against a backdrop of British post-war protest and prejudice, secures the position of Goalkeeper at Manchester City, and in doing so becomes a footballing icon. Struggling for acceptance by those who dismiss him as the enemy, Bert's love for Margaret carries him through and he wins over even his harshest opponents by winning the 1956 FA Cup Final, playing to the final whistle with a broken neck. But fate will soon twist the knife for Bert and Margaret, when their love and loyalty to each other is put to the ultimate test.