High school senior Alexandra (Alex) is gifted with the power to see the exact moment someone will die. During her premonitions she witness a mystery girl getting murdered in the future, she knows that this time she can finally save someone. Lucas Winter comes to the quiet town of Sleepy Hollow at the exact same time that a serial killer does. Sleepy Hollow is now housing the famous serial killer The Scientist, who they just realized isn't human and now has a strange obsession with Alex. Now Alex, Lucas, Kat and her best friend Noah have to stop him from unleashing Pandora's box into the human world. Didn't they say that senior year of high school is easy?