In the shadowy glow of Halloween night, four interwoven tales of horror unfold in the sleepy town of Warren Valley, Ohio. Ancient traditions come to terrifying life, with a mysterious little trick-or-treater named Sam ensuring that the rules of Halloween are strictly followed. From a high school principal with a deadly secret to a vicious attack on a hermit, no one is safe from the eerie happenings that lurk behind every jack-o'-lantern.