Following a volcanic eruption along the China-North Korea border that leaves the entire Korean peninsula in shambles, seismologists warn that an even greater eruption is forthcoming, one that could devastate the entire region. Enlisting the help of renowned Korean-American scientist Bong-rae, the government scrambles to find a way to stop the impending explosion. Bong-rae's plan calls for the use of nuclear warheads, which are currently held in North Korean territory.