According to Arctic legend, if you whistle at the Northern Lights, they'll swoop down and carry you off forever. Eline Davis was there on the remote glacier in Svalbard, when her mother whistled, then vanished. Years later, living with her dad on Cape Cod, Eli discovers the Northern Lights will be visible there for one night. She hatches a plan to use the lights to contact her missing mother... and it works. Her mother arrives... but magical, dangerous...