The word "father" seems to be unfamiliar to her since she was a child, but yet so kind. Her dream is to enter the environment where her father once worked and find out the reason why her father disappeared. She gets to know the most important people in her life, lovers, friends, and comrades-in-arms. When these people work hand in hand to get closer to the truth, they find that things are getting more and more complicated, involving one case after another. Who is the truth?