S. Darko follows Samantha Darko, the younger sister of Donnie, the protagonist of Donnie Darko, and her friend Corey. On their way to California, their car breaks down, forcing them to wait in a small town until it is fixed. While there, Samantha begins to have dreams that warn her of the end of the universe.

A former U.S. soldier returns to his hometown to find it overrun by crime and corruption, which prompts him to clean house.

Bill Dancer and his young companion Curly Sue are the classic homeless folks with hearts of gold. Their scams are aimed not at turning a profit, but at getting enough to eat. When they scam the rich and beautiful Grey Ellison into believing she backed her Mercedes into Bill, they’re only hoping for a free meal. But Grey is touched, and over the objections of her snotty fiancé.

After a lightning bolt zaps a robot named Number 5, the lovable machine starts to think he’s human and escapes the lab. Hot on his trail is his designer, Newton, who hopes to get to Number 5 before the military does. In the meantime, a spunky animal lover mistakes the robot for an alien and takes him in, teaching her new guest about life on Earth.