In A.D. 2066, a small nation breaks away from the United Nations and soon after, members of the International Science Organization vanish without a trace. Kouzaburou Nanbu, a celebrated scientist, discovers that the enigmatic "Gallactor" organization is plotting to take control of the world. To stop this terrorist threat, he assembles a team of five courageous heroes known as the Science Ninja Team - Gatchaman - and equips them with his most powerful weapon.