Falling through Stars by Staci Olsen

SPFBO8

After crashing her dogsled into the frozen river, Ts'ellbah fears something is wrong, something deeper than the inexplicable new scar over her heart. She feels like a stranger in her own skin and struggles to remember her closest friends and family. At first, her clan is relieved that she survived the accident. But on a night when red spirit lights stain the sky like blood, Ts'ellbah suffers her first violent seizure and sees a vision in which a revered elder encounters a mythical monster and dies. When her announcement of the elder's death proves correct, many people are convinced something evil possessed her in the dark river. They believe she killed the old man and want to cast her out. Before they do, Ts'ellbah must persuade her people that their ancient enemies have indeed returned, that they are looking for something, and they'll destroy the entire clan to find it.