Kamen Rider V3 Vs. Destron Mutants is the original movie for Kamen Rider V3. It was later broadcast on TV as part of the Immortal Kamen Rider Special.
A physicist named Tetsuo Okita discovers a new mineral called "Satanium," which is more powerful than uranium and emits destructive effects to anyone exposed to it. However, Destron abducts Okita in hopes of finding the source of Satanium and collecting more of it to expedite their run for global domination. Kamen Rider V3 must act fast in rescuing Professor Okita and preventing Destron from collecting more of the deadly mineral.
This movie contains examples of the following tropes:
- Defeat Equals Explosion: Played straight for the Destron monsters.
- Mineral MacGuffin: Satanium
- Monster of the Week: Cannon Buffalo is the unique monster for this movie.
