When a devastating attack on Los Angeles by an army of machines from a parallel universe sparks a massive world war, Californian surfer John Blake joins up with the US Marines to head across the Pacific to join the fight against the machines. But their first battle on the coast of Taiwan goes horribly wrong, and the Marines must retreat to Australia. With allied forces now pushed to the brink of annihilation, John and his team are on a mission to destroy an enemy installation on a remote Pacific island, backed by a massive Navy fleet. But the enemy forces are too strong, and John and his team are shot down scattering the Marines across the island. Now stranded and outnumbered, the Marines must find a way to band together and defeat the enemy or the whole world may be lost.