By the year 2050 AD, a mysterious organization called Galactor has occupied half of the Earth and threatens to exterminate the human race. Around the same time, the International Science Organization had uncovered mysterious stones that bear unusual powers. It is said that one person out of approximately eight million is able to harness the power of the stones; they are known as a “Receptor”. Dr. Kozaburo Nambu gathers a team of these five lucky Receptors together. Known as the “Gatchaman” team, it is their mission to defeat Galactor.

3 years after the ultimate life-or-death game with Teiai Group, Kaiji was entrapped by Teiai and again back in the underground, forced to do hard labour. One day, Kaiji wins a bet to get out of the underground with 1 million yen, and promises the other workers that he will save them. But to do so, he only has 14 days and needs 200 million yen! Kaiji meets his former rival Tonegawa and learns that there is a chance to turn the tables in the game. It was a monster casino machine that will make 1 billion yen if you win…

The ST team at the Tokyo Metropolitan Police Department consists of eccentric members. Some members do not cooperate with others and others do not reveal themselves in front of others. With Samon as the leader of the ST team and young Inspector Tomohisa tasked with managing the team, the ST (Scientific Task Force) attempt to solve the most difficult of cases.