Ultraseven takes on Alien Magma and twin monsters by himself. The new hero Ultraman Leo is introduced here. He is determined to protect his second home, Earth.

Leo is nearly overwhelmed by the Giras Brothers and Alien Magma, but is saved by Dan. The city is not so lucky.

A mysterious alien begins attacking a brutally killing MAC members. Leo must stop it.

Leo is defeated, and Dan trains Gen even harder. Unfortunately, the monster won't wait.

Gen must train, using Dan's strange machine, to defeat the monster Kanedoras. But will Tooru forgive him?

Gen/Leo fails to save a woman, angering her lover. He must train to defeat the new threat.