Cassie Robichaux's life after the sudden death of her husband is filled with sadness. During the day she works as a waitress in a small cafe, and spends her nights alone in her uncomfortable one-room apartment. But everything suddenly changes when she accidentally finds a diary in the cafe. The confessions recorded in it will shock and enchant Cassie, because they tell about her deepest and most unbridled desires. Meeting the author of the notes leads Cassie to the secret women's society S.E.K.R.E.T., where she can realize all her fantasies.