The game's story takes place on a parallel Earth, in which mankind lives in relative peace, until an event occurs that threatens the lives of the whole planet. The national government of an unnamed country discovers that the transportation of two defective nuclear missiles has gone wrong, after they begin leaking radiation. The automated carrier transporting them becomes damaged as a result and automatically sets itself on a direct course towards the site for a controlled detonation, effectively placing it in danger where the slightest jolt from hitting buildings or falling into pits would trigger the missiles, causing a catastrophic explosion.
