The appearance of a kaiju followed by the entry of the gigantic robot, Dynazenon, leads Gauma to reveal his secret of being a "kaiju user."

The Kaiju Eugenicists ask Gauma to join them; Chise feels jealous; Yomogi, Yume, and Koyomi confront Gauma about his past.

Yomogi and Koyomi try combining Dyna Soldier and Dyna Striker; Gauma tries to capture Sizumu while everyone is at the beach; Sizumu is summoned by the other Kaiju Eugenicists.