Gappa the Triphibian Monster

A team of explorers in the South Pacific stumbles upon a hidden island where the locals revere a mythical deity, Gappa. During their stay, a seismic event uncovers a subterranean cave, revealing a baby reptile. Despite warnings from the islanders, the expeditionists abduct the creature and transport it to a Japanese zoo. However, their actions unleash a devastating chain of events as the parents of the reptile, Gappa, wreak havoc on Tokyo in a desperate search for their stolen child.