Thirteen-year-old Ella and her best friends Eileen and Roxana encounter an interdimensional being named Helana during a sleepover, who appears as different benevolent figures to each girl and reveals glimpses of their legendary futures. When Helana tries to leave after accidentally revealing herself and disrupting their timelines, Ella cleverly traps the entity by claiming authority over her domain, forcing Helana to stay as their `genie in a bottle` despite her pleas to return home.