Simone, the charming daughter of Lord Belgrave, goes to stay in Berlin and becomes an unwitting witness to a spy plot. The girl not only warns her compatriot, the Marquis of Midhurst, about the provocations being prepared against him, but also, showing courage, helps him outwit the enemy. And of course, love arises between them - real, sincere, deep, which, according to the author of the novel, can only be “sent down from above.”