An unknown blackmailer threatens to ruin the life of young Celeste Paxton by making public the letters that her lover once wrote to her mother. Her half-sister Aurora, mercilessly expelled from London society several years ago due to a scandal, understands well: the fragile Celeste simply will not survive this. Therefore, the fearless girl decides to personally steal the letters from the scoundrel, whom she believes to be Lucas Vale, Marquis of Dashell. However, instead of an enemy, she finds in him a comrade in misfortune, ready to help in her risky business. Lucas and Aurora rush together in search of letters, overcoming all dangers, and every day they become closer and closer. Very soon their forced union turns into friendship, and friendship is replaced by a much more tender feeling...