During the war on Cybertron, the Mini-Cons, mini-transformers who can be used as upgrades by their bigger brethren, crash lands on Earth. In present day, a group of children finds their ship by accident which brings the war to Earth.

Escaping from the confrontation between Bots and Cons, Alex, Rad and Carlos find the cargo hold of the Exodus underground and are adopted by three minicons. Retreating to the moon, the 'Cons make the wreck of the Exodus there their base.

Alexis, Rad and Carlos introduce themselves to Optimus Prime, Hot Rod and First Aid, and get a condensed history of the conflict. Meanwhile, on the moon, Megatron plots to capture the minicons that are now appearing all over earth.

The children join the Autobot team and head out on their first mission to find a newly waking minicon. The Decepticons arrive to combat them. Optimus Prime finds his old minicon partner.

The next minicon alert is from Antarctica. Starscream retrieves the minicon, but has it stolen from him. Hot Shot learns a lesson in cooperation.

The newest minicon activates in the middle of a forest: both sides fight for it, and the conflict sets the trees alight. The Autobots attempt to battle the blaze, while Starscream finally acquires his own minicon.