S. Darko takes place in the summer of 1995, seven years after the original film. It follows Donnie Darko's younger sister, Samantha (Daveigh Chase), who, in the wake of his death, has found herself at age 17 with a broken family, mired in feelings of insignificance. She and her best friend Corey (Evigan) set off on a road trip to Hollywood in a bid to 'make it big', but their journey is cut short when their car breaks down unexpectedly, leaving them stranded in a small desert town. When a meteorite happens to crash-land nearby, Samantha is plagued by bizarre visions telling of the universe's end and it appears that their breakdown was part of some grander plan. When she finds out she was actually adopted by the Darkos, and that she is in no way related to Donnie, she must face her own demons and, in doing so, save the world and herself.