In the Midori Mahjong parlor, Nangou is trying to cancel his major debts by playing some Mahjong but this may be his unlucky day as he is losing badly. Just when the situation gets dire an unknown boy walks in on their game and with a simple word of advice and Nangou is able to survive. This may be the beginning of the legendary Shigeru Akagi who will shake the underworld.

On a stormy night, after winning his first hand of Mahjong, Akagi continues playing against Ryuzaki and his gang members, as he slowly awakens to his latent talents. Akagi quickly turns the tide in his favor and takes the lead, so Ryuzaki calls in his last resort, Rep player Yagi.

The silent battle between Akagi and Yagi ensues and nothing else matters except whose judgement in their own actions wavers first. Yagi knows that he cannot beat Akagi fair so he uses a form of cheating called the "caterpillar" in order to utilize the genius Akagi's weakness. As soon as Akagi learns this fatal mistake he decides to counter by taking them for all they've got.

It hasn't been long since Akagi's legendary victory in his first game of Mahjong and Yasuoka has already set up a match for him, in 3 days from now but Akagi wants more from him. He is called in by the gang he's supposed to play against and they want to make a deal but whilst there Akagi meets a mysterious blind man who will later be his opponent.

It is the date for the rematch between Akagi and the Kawada group and now with the stakes so high, they decide to go with the blind Mahjong master Ichikawa as Akagi's opponent. The only problem is that Akagi hasn't arrived, so Nangou is forced to take his place. Akagi makes it just in time but he has a lot of points to cover if he's going to win this. Let the Tse Ii Men begin!

The match has turned into a one-on-one "Tse Ii Men" between Akagi and Ichikawa and due to Ichikawa's effective strategy; Akagi is beginning to feel the pressure. However just when Akagi is at near with only 5,000 points, he's surprisingly able to make a comeback. Nonetheless with Ichikawa playing defensively there seems to be no end to this game, so Akagi decides to win even through more dirty methods.

Following the dirty stunt Akagi pulled, the game of Mahjong has turned into a sudden death with players left with only 10% of the points. With Ichikawa now using any means to achieve victory, Akagi must now turn the match in his favour but whose side will luck be on tonight?

6 years has past since Akagi's legendary Mahjong match against the Kawada group and Yasuoka has brought Akagi before them to demonstrate his skills. However there is something different about this Akagi from the one 6 years ago and it could be because he's a fake. So Ishikawa from the Kawada group enlist the help of Nangou to find the real Akagi.

At the Kawada group's headquarters, the fake Akagi (Yukio Hirayama) and the genuine Akagi face off to demonstrate their skills. Akagi insults the impersonator, because of his reliance on his mathematical skills and excellent memory, and shows him just how frightful his talents are. Following this he then returns to his workplace to find his senpais swindling Osamu in a game of Mahjong.