Optimus Prime and his band of Autobots are taken off the job when the Cybertron Elite Guard, led by Ultra Magnus, comes to Earth looking for the AllSpark.
An AllSpark shard brings to life a robot made of junk and garbage, who sets about finding his place in the world... much to the expense of everybody around him.
The Autobots are searching for an AllSpark fragment when they encounter a group of street racers, whom they capture for the police. Bumblebee joins the races to learn more about the blue car that eluded them.
A convict named Wasp escapes from Autobot prison, and Bumblebee picks up a call between Megatron and his agent on Cybertron. Bumblebee attempts to track the source of the signal on Earth while remembering basic training, where he met Wasp.