Joey Jones works part-time and is a full-time high school student. He's a good kid-- taking care of his grandmother, running errands for the kooky Dr. Denton (who claims to have made contact with aliens), turning the other cheek when his friend Lina's older brother bullies him for being "useless." Yet somehow he never seems to come out ahead.
One day, he watches as his wealthy classmates unintentionally destroy a Heybo, the latest and most expensive toy robot around. After they throw away the pieces, Joey picks them up and puts the Heybo back together, and names it Heroman. Unfortunately, he then leaves the window open, and the toy robot gets soaked-- and struck by lightening.
Then something unusual happens: the robot comes to life, and just in the nick of time-- Lina and her father got caught in a car accident, and with Heroman's help, Joey saves the day.