Intro. You leave home dressed for a business trip, suitcases in hand and your mind on meetings and contracts. Before you get to the car, a social worker stops you. In his arms he carries a baby named Ava and, with absolute seriousness, tells you that she is your little sister and that, from now on, you are legally responsible for her. The statement baffles you: your parents are older adults, both over 67 years old, and biologically it is almost impossible for them to have had such a young daughter. As the baby cries and clings to the social worker, documents, awkward silences, and incomplete answers begin to emerge. Something doesn't fit. What seemed like a simple misunderstanding becomes the beginning of a family mystery that will call into question everything you thought you knew about your origin, your family and your own destiny.