A doomed spacecraft. As the US's unmanned advanced aircraft Nighthawk mysteriously vanishes over the South Pacific, China and Russia's fleets race to find it first. A race against time. Hot on their tails are Kurt Austin and the NUMA team, travelling from the Galapagos Islands to the jungles of South America to hunt down the missing rocket. A devastating weapon. Chilled to absolute zero in space Nighthawk poses no harm, but with only seven days until it thaws the NUMA team have to work against the clock to stop its deadly payload from wiping out all of life on earth.