The two Koreas have signed a historic reunification treaty, promising to end decades of division. On the day the pivotal bill is set to pass, a terrorist group strikes the South Korean National Assembly. Ji Jeongtae, a North Korean special forces operative dispatched to the South under the new peace accord, finds himself isolated within his unit and assigned to track down the terrorists behind a string of attacks driving civilians into uncontrollable rage. Eight months of quiet follow. Then Beolmuban storms the stage of the first state-sanctioned concert under martial law — and Jeongtae uncovers a dangerous secret tied to GAVI, the brightest star of the K-pop group ORDO.