As her Parkinson's disease progresses, a woman leads a relentless investigation into finding those responsible for the sudden death of her daughter.

Elena searches for the person responsible for the sudden death of her daughter, Rita. Not being able to obtain answers that help her understand what happened, she herself is the one who embodies the investigation. Despite the progress of Parkinson's disease that she suffers from, she undertakes a train trip from the suburbs to the Capital, seeking the help of an old friend of her daughter's. Her inevitable memories of her mother will confront her with an unexpected revelation from her.