Yasuko Agawa

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.

Professor Shiraki arrives at an isolated girls' boarding school to take a new position. Upon arrival, he learns the principal's wife died in a car accident and is being kept in the cellar, according to local tradition. The principal startles Shiraki by asking him to become his successor, but Shiraki soon discovers that the principal has much darker motives.