1990s. The London Underground system is emerging from the austerity of the 1980s. New budgets have created the financial backing for security fencing and CCTV. Despite this, graffiti persists on the trains and the playground of subterranean tunnels and infrastructure... Two rival graffiti crews come head to head when a shadowy figure from the past threatens the balance on the lines. The old master 'Stainer' has warned of an oncoming war in which the trains themselves are the prize and, simultaneously, the target for destruction!