Iris, a mute girl with an extremely hyperactive imagination, is suffering from her parents' recent divorce along with the daily tragedies of everyday life. Her best friend, Hollow, is the only one who supports her during the most difficult moments of her life—until, eventually, they try to separate them too, pushing her physical and mental life to an end. After her life ends, Iris will arrive in the world of dreams and nightmares, along with Hollow, her best and only friend, who surely isn't a teddy bear...