It's a spectacular collision of real and virtual worlds and the consequences are potentially earth shattering. On one side, South Korea, the most wired place on earth with an internet that sizzles into 90% of all homes, powers commerce and super-charges entertainment including a national obsession with internet games. On the other side, North Korea, arguably the most paranoid and dangerously unpredictable place on earth, with a million-strong army and, we reveal, a super-secret team of state-authorised hackers looking to bring chaos to the neighbourhood and beyond.