Gabi is furious about her parents divorcing and moving her away from her hometown, her friends, and her school. But on the day she moves away, a shooter opens fire on Gabi's old school, killing her American History classmates. She knows she should have been in that classroom. Now Gabi has to navigate a new school and new social circles, while dealing with a looming dark cloud of grief, survivor's guilt, and fear. She meets impulsive troublemaker Lennon, who might just understand her dark side, or may pull her deeper into it.