During the Cybertron Civil War, the Autobots were defeated by the Decepticons. Commissioned by the Autobot leader Optimus Prime, the robot code-named B-127 came to Earth to find a new safe haven.
On Earth, B-127 was misunderstood by the human army led by officer Burns, and was also pursued by the Decepticons. During a battle, his energy was about to run out, and he had to turn into a scarred second-hand car. A few years later he met the girl Charlie, who rescued him and soon discovered the secret hidden in him! However, she still became a good friend with him and named him "Bumblebee"... The Decepticons never gave up the pursuit of Bumblebee. Smash and Reflector deceived humans' trust and used radio to track Bumblebee's whereabouts. An inevitable fierce battle is about to begin. Can Bumblebee complete the mission assigned by Optimus Prime and protect the earth and his human friends? Who else will join this fight in the future?
