After leaving their company Christmas Party together, David Hargrove and Emily Brandt’s impromptu first date takes an unexpected turn when their coworker, Corey, asks them to make a late-night stop at an ATM. What should be a routine transaction turns into a desperate struggle for survival when an unknown man appears outside the vestibule. With the wintry temperatures dipping below freezing, and the morning sunrise still hours away, they have no choice but to play the man’s deadly game of cat-and-mouse.
Four young grade-school girls witness the murder of one of their classmates during what they thought was just an innocent game. The killer is a strange young boy named Milo Jeeder. Sixteen years later, the four survivors of the event re-unite under happier circumstances in the same town where it happened. They believe that Milo drowned in a river shortly after the murder, but soon learn that the demonic killer Milo has also returned, still a young boy, unchanged even after almost two decades.
People commit unthinkable acts every day. Time and again, we grapple to understand what drives a person to do such terrible things. But what if all of the questions we're asking are wrong? What if the cause of all evil is not a matter of what…but who? When three college friends stumble upon the horrific origins of the Bye Bye Man, they discover that there is only one way to avoid his curse: don't think it, don't say it. But once the Bye Bye Man gets inside your head, he takes control.