The story centers on Leonard and Gabe, two best friends who bonded over the annual Devil's Night holiday that eventually lead to their friendship's abrupt ending. 15 years later, Leonard and Gabe must reunite to help save their town from massive destruction and chaos. The title refers to October 30, which, in the 1970s and 1980s, was an unofficial "holiday" where young men and women would commit acts of vandalism and arson. Devil's Night was previously referenced in The Crow and Grosse Pointe Blank.
Andrew Mogel and Jarrad Paul wrote the screenplay, with Will Ferrell and Adam McKay producing through their Gary Sanchez Productions company. No production schedule was given.