Wilder continues to revisit his past when he kidnaps a former member of his gang who turned against him, and Shūta has to lead the Headmaster Juniors in rescuing him.

In an attempt to learn the secrets of the Godmasters, the Autobots capture Cancer, who develops the world's worst case of Stockholm Syndrome.

A new threat to the Autobots arrives from space in the form of Sixknight, a Six Changer who targets Ginrai in order to prove his worth to the Decepticons. But Sixknight is in for a shock when he discovers the true nature of his opponent...

Ginrai faces his greatest challenge yet when Mega and Giga reveal their true power.