As a war between humankind and monstrous sea creatures wages on, a former pilot and a trainee are paired up to drive a seemingly obsolete special weapon in a desperate effort to save the world from the apocalypse.
On the run in the year 1987, Bumblebee finds refuge in a junkyard in a small California beach town. On the cusp of turning 18 and trying to find her place in the world, Charlie Watson discovers Bumblebee, battle-scarred and broken.
Sam Witwicky leaves the Autobots behind for a normal life. But when his mind is filled with cryptic symbols, the Decepticons target him and he is dragged back into the Transformers' war.
Jake Pentecost, son of Stacker Pentecost, reunites with Mako Mori to lead a new generation of Jaeger pilots, including rival Lambert and 15-year-old hacker Amara, against a new Kaiju threat.
Autobots must escape sight from a bounty hunter who has taken control of the human serendipity: Unexpectedly, Optimus Prime and his remaining gang turn to a mechanic, his daughter, and her back street racing boyfriend for help.