When a bullet train powered by a revolutionary G-Reaction engine vanishes in flash of blinding, rainbow light, boy geniuses Billy Kimura and Penny Carter race to uncover the secrets behind a deadly alien invasion!
Penny and Lotta are captured by helmet worms and taken to the enemy's secret base. With time running out on the hostages and humanity, Captain Clayton and James attempt to destroy the aliens' advanced weaponry.
Captain Clayton and James are wounded in a surprise terrorist attack, and Penny is crushed to learn the identity of the bomber. As alien forces turn deceased hostages into weapons, G-Reaction engines all over the world mysteriously fall silent.
The world's most brilliant minds fail to find a reason for the sudden incapacitation of all G-Reaction engines, but Lotta solves the problem with one false step. Armed with this new knowledge, Penny and Billy undertake a daring rescue mission.
Ace pilot James leads a desperate attempt to destroy the alien base and prevent planet Earth from entering a new ice age. Elsewhere, Billy uncovers an extra-terrestrial mind control plot, and Penny searches for clues about Element X.
