What can four women, completely unknown to each other, have in common? Nothing, until they are called by a lawyer to inform them that they are the sole heirs to a man's estate... whom no one knows! From that moment on, the four women are faced with the challenge of discovering what is happening and who is behind the mysterious case. In their quest to learn more, they are challenged to solve puzzles, meet enigmatic people and get involved in adventures they could not even imagine...