When a massive comet collides with the Sun, the explosion jettisons the planet Mercury from its orbit and sends it on a fatal collision course with Earth. With each passing day, Earth’s unstable gravitational field creates catastrophic disasters that threaten to tear the planet apart. The only hope for survival is a hidden top-secret military weapon that has the power to destroy Mercury before it slams into Earth. It becomes a race against time to find the weapon the military has kept hidden for 20 years.