Some autobots are captured. The remaining Autobots team up with some rebels to free their friends, the rebels know all the weaknesses of their enemies machines. They merge with the Autobots to become Headmasters to free their friends.
机械帝国·黑岩浆企图征服世界,它利用高科技制造出一连串大灾害,并在联合国会议中向人类宣战。因此,联合国一致通过组建“太阳战队”的方案,让太阳战队与机械帝国黑岩浆对抗。