'The Secret Adversary' is the second published detective fiction novel by British writer Agatha Christie in 1922. Tommy and Tuppence, a bantering pair of 1920s bright young things who solve a mystery together. Short on money, opportunities and adventure; both embark on a daring get quick rich scheme. They advertised boldly proclaims that they are 'willing to do anything, go anywhere'. By the time the dust settles, all the puzzle pieces have been fitted together - and the young couple have realized their feelings for each other and have become engaged. They are hired for a job that leads them both to many dangerous situations, meeting allies as well, including an American millionaire in search of his cousin.