Chief Kuroki plans to increase the military potential of the Buster Machines while Enter creates a new Metaloid right in front of the Go-Busters, something that they realize is out of character for him.

Ryuji and Yoko escort an Enetron tank across the city when TireRoid is sent after it. However, something happens to Ryuji when he overheats, making him turn against his own team.

Taking a day off from their missions, the Go-Busters and their Buddyroids head to a local amusement park and zoo. However, they discover Enter wandering about and planning, and to make matters worse, Commander Kuroki suddenly left the base without warning.

Hiromu and Ryuji must figure out a way to save Yoko from Tubaloid 2 after her Weakpoint activated at the wrong time.