Using several clips from previous Gamera entries, this film deals with alien forces sending all the monsters Gamera has faced in one final battle to rid the planet of its last hope....
Akio (Nobuhiro Kajima) and Tom (Christopher Murphy) witness the landing of a spaceship in a vacant lot near their home and promptly investigate, only to be whisked into outer space by the craft once they find it. The ship takes them to the dying plan...