Bloodstream

Dr. Claire Elliot moved to quiet Tranquility, Maine with her rebellious teenage son Noah after the death of her husband. She takes over a small medical practice and starts to rebuild her life, but after only being in town for a short while, strange things start happening among the town's youth. Teenage pranks rapidly accelerate into a shooting spree at the local school.

Clare wonders why some of the town's residents want to cover up the incidents and she also wonders if there might be a medical explanation for everything that is going on. Then folks start blaming her for what's happening and it looks like they want to drive her out of town. Convinced that there's a medical reason for the evil behavior of the town's teenagers, Claire chases after every clue she can find. Then her son is arrested for a hit and run and that leads to the clue that might solve the puzzle.