Eric Kripke's Supernatural is about two brothers, Sam and Dean, who were raised by their father, John, to hunt and kill all things that go "bump in the night" after his wife, Mary, was murdered by something supernaturally evil when the boys were young. 22 years later the brothers set out on a journey, fighting evil along the way, to find their recently missing father who, when they finally meet up with, reveals he knows what killed their mother, a demon, and has found a way to track and kill it.