Sean is bullied at school but his mother seems more concerned with making sure he babysits his younger brothers while she goes out with her boyfriend, so Sean decides to run away from home.
Molly reluctantly agrees to let Sean tag along as she tries to make her way back to her old family home. When a motorway blocks their path, they use a badger tunnel to cross, but when it rains the tunnel starts to flood.
Sean and Molly get a lift down the canal on a barge, but when they finally reach Molly's old home they discover that it's been demolished. Things start to get ugly as Molly takes her frustration out on the barge owner.