Résumé : Three students from France, Germany and Spain meet in London on an English course and find themselves involved in a murder mystery over six hundred years old! Guillaume is from Paris, Antonia from Madrid and Thomas from Berlin. All three are staying at Lizzie's home just outside London. When they go on a guided tour of the tower of London, something very strange happens and a thrilling adventure begins. They enter a world of mystery where murder and treachery but also friendship and loyalty lead them to an incredible discovery about their own role in British history !