In a ruined and toxic future, a community exists in a giant underground silo that plunges hundreds of stories deep. There, men and women live in a society full of regulations they believe are meant to protect them.

Students Hayley and James are young and in love. After saying goodbye for Christmas at a London train station, they both make the same mad split-second decision to swap trains and surprise each other. Passing each other in the station, they are completely unaware that they have just swapped Christmases.

King Charles VI declares that Knight Jean de Carrouges settle his dispute with his squire by challenging him to a duel.