After working endlessly to build herself the career she had always dreamed of, Keiko enjoys the benefits of a newfound success and finally feels that her haunted past is behind her. The sudden news of her sister's disappearance changes everything, sending Keiko down a spiral of anxiety and regret. She cannot go on without Eriko. With her sister's only companion, Will, Keiko sets off on a journey to bring Eriko back home. They are completely unaware...