The document describes two main characters - Ryan, the depressed brother who took his parents' death hard and is now missing, and Louise, his formal and strong-willed sister who has returned home to search for him. It also mentions two mysterious followers. The story is about Louise desperately searching for her missing brother after their parents' accident, going to extreme lengths to find him. Key themes are revenge and persistence, and the film was inspired by works like The Last of Us and The Edge that explore surviving at all costs.