1986: Eddie and his friends spend their days biking around their sleepy English village and looking for any taste of excitement they can get. The chalk men are their secret code: little chalk stick figures they leave for one another as messages. When a mysterious chalk man leads them right to a dismembered body, nothing is ever the same. 2016: Eddie thinks he's put his past behind him. But then he gets a letter in the mail, containing a single chalk stick figure. His friends got the same message, and they think it's a prank... until one of them turns up dead. What really happened all those years ago?