Dr. Raichii's revenge plot is almost quaint next to what DBZ usually throws at you, which means the OVA gets to mess with the formula in ways the series never could. The animation is rough enough that it feels like watching someone's bootleg VHS of a fever dream, but that's part of the charm when Trunks is out here making icicle swords and the entire cast is shuffling through 72 hours of setup with the energy of a side mission. This is a show for people who've watched everything else and want to see what DBZ looks like when it stops trying so hard.
An ancient grudge resurfaces when Dr. Raichii, the last surviving member of the Tsufurujin race, emerges from hiding with a singular mission: annihilation. Centuries ago, the Saiyans wiped out his entire civilization. Now he's found his opening. Goku and Vegeta are still breathing, and Raichii has engineered the perfect weapon: destron gas, a suffocating poison spreading across Earth through hidden machines. The Z fighters have seventy-two hours before the planet chokes under chemical clouds. What should be a straightforward hunt becomes complicated when the survivors realize they're not just fighting a mad scientist. Raichii has transformed himself into something beyond human, blending Tsufurujin science with the very Saiyan power he despises. Every clue leads deeper into a conspiracy that forces Goku and company to confront the consequences of their race's brutal history. Between genuine tension and comedic relief, this compact two-episode arc delivers revenge, desperation, and the kind of high-stakes desperation that reminds you why these warriors matter.