萬獏は、明晰夢能力を駆使し、国民的有名人ネムを鮮やかに救出、夢の中で難関ミッションをクリアする無敵のエージェント。
ある夜、バクは突如怪物ナイトメアに襲われる。明晰夢の中で、バクは無敵の敵と戦うが、なぜかナイトメアを倒すことができず、逃走してしまう。追い詰められたバクは、謎の人物と出会い、ゼッツドライバーとカプセムを託され、仮面ライダーゼッツへと変身する！
Baku is an invincible agent who uses his lucid dreaming abilities to brilliantly rescue national celebrity Nemu and complete difficult missions within his dreams.
One night, Baku is suddenly attacked by the monster Nightmare. In his lucid dream, Baku fights the invincible enemy, but for some reason is unable to defeat Nightmare and ends up fleeing. Cornered, Baku meets a mysterious person who entrusts him with the Z Driver and Capsule, allowing him to transform into Kamen Rider Z!
