The Futurians, time-travelers from the 23rd century, arrive in Japan to warn them of the nation's destruction under Godzilla. They offer to help erase Godzilla from history by preventing his creation. With Godzilla seemingly gone, a new monster emerges as the Futurians' true intentions are revealed.

Inventor Goro Ibuki creates a humanoid robot named Jet Jaguar. It is soon seized by an undersea race of people called the Seatopians. Using Jet Jaguar as a guide, the Seatopians send Megalon as vengeance for the nuclear tests that have devastated their society.

After the previous Godzilla attack, a miniature arms race ensues to collect his cells. Concerned over Godzilla's possible return, the Japanese government uses the cells to create a new bio-weapon, ANEB (Anti-Nuclear Energy Bacteria). They seeks the aid of geneticist Genshiro Shiragami, who's experiments result in a new mutation.

A submarine expedition to salvage the remains of Mechagodzilla is thwarted by a massive dinosaur named Titanosaurus. An Interpol investigation leads biologist Ichinose to uncover the work of Dr. Mafune and his mysterious daughter Katsura. Aligned with the Black Hole Aliens, Katsura's life becomes entwined with the resurrected machine.

In a futuristic Japan, the Sibyl System is charged with keeping the peace. When the state of SEAUn brings the Sibyl System in to test its effectiveness, it becomes a haven of peace and safety—for a time. Eventually, terrorists from SEAUn begin appearing in Japan, somehow slipping through the System's security and attacking from within. Desperate for answers, Inspector Akane Tsunemori is sent overseas to bring the terrorists to justice. But when her investigation forces her into a standoff with an old ally, will she be able to pull the trigger?

Lonely youth Shinji meets Hatsue, a pretty pearl diver, on the beach and the two fall in love. But Shinji has a rival for Hatsue's affections, Yasuo. Yasuo spreads unpleasant gossip about his rival, and Hatsue's father forbids her to see Shinji. But when the boy saves the passengers on a boat owned by Hatsue's father, his luck in love begins to change.

Yuko is a sexy club singer that used to live with her lover. One day, her lover died in a traffic accident. Yuko is overwhelmed with sorrow, but a man who claims to be her lover's brother suddenly appears, causing a confrontation over the remains. In addition, the manager of the apartment where Yuko lives joins in, and it develops into a big commotion.

A professor takes up a new post at an all-girls school only to discover the principal concealing a dark secret.

The Isokaze, an Aegis-class escort vessel, sets sail on a routine training exercise, playing host to a platoon from the Fleet Training Group. No sooner is the Isokaze on open water, however, then the FTG reveal themselves to be terrorist stowaways who kill the ship's captain, send the rest of the crew overboard and take control of the vessel. The ship is carrying a secret biological weapon which the terrorists are now threatening to use to level Tokyo! Only a stowaway NCO, Sengoko (played by Sanada Hiroyuki from Ring and Twilight Samurai) is in a position to stop them - but does he really have what it takes to save the day? Playing like a cross between a sea-faring version of Top Gun and Die Hard, director Sakamoto Junji shows that it's not just Hollywood that can produce thrill-a-minute action spectaculars.