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.。《智齿》改编自雷米小说。讲述从学堂毕业的任凯,因一宗连环凶杀案,与刚复职的展哥开始搭档。案子破不了反倒引发连串事故,展哥重遇杀妻儿的街童王桃,被激发的恨意一发不可收拾;任凯大意失枪,误被凶手所获。凶手潜伏在城市之中,危机逐步逼近。。