As an orphan, Naoto Date was scouted by mysterious organization Tiger's Cave. The group trains young men to become villainous wrestlers and collects half of their earnings. Naoto Date goes through a harsh training regime and eventually graduates from Tiger's Cave. He hopes other orphans will not have to go through the difficult life he has. Naoto Date then makes his debut as the villain Tiger Mask. With his earnings, he also begins to donate his earnings to an orphanage where he grew up. When Naoto Date hears of the orphanage's desperate financial situation, he donates all of his earnings, including the portion that is supposed to go to Tiger Cave. Tiger Cave now considers Naoto Date a traitor and they send assassins to get ride of Tiger Mask.
Kurenai travels to Las Vegas to search for his father's killer. Broke and with nowhere to stay he seeks refuge in an alley where he hears cries for help from vicious bikers. Kurenai defeats the bikers and is invited to the warehouse where Rita and Chico live with other runaways. Meanwhile in another part of Las Vegas, an underground wrestling match is being fought where the stakes are high and the only rule is, the loser dies! Fight organizer Rossner needs fresh blood for his fights and hires Jane Costello to find him a new champion.
Two young wrestlers face each other in a recently revived underground wrestling organization, the Tiger's Lair, which destroyed the wrestling dojo they grew up in. One took over the training facilities of Naoto Date at the foot of Mount Fuji, as well as the mask he left behind. The other dared to enter the Tiger's Lair and won a fierce competition, receiving a jet-black tiger mask. One tiger walks the path of light, while the other walks the path of shadows. Neither one knows the other's face. On the ring, they are natural enemies, but they have the same purpose—destroy the Tiger's Lair!
A villainous masked wrestler becomes a hero for the sake of protecting the orphanage in which he was raised.