Action Man: A.T.O.M.

After competing in and completing the reality show, Trackdown, the five contestants, Axel, Hawk, King, Lioness and Shark are offered jobs to test new and experimental vehicles for Mr Lee, Trackdown’s creator and president and founder of Lee Industries, a multi-billion dollar company. The five accept his offer, but when a dangerous criminal mastermind named Paine escapes from prison, Axel has personal interest into helping recapture him.

Lee, who is acting clingy and parental around the team, equips them with new gear and weaponry to test. At the same time Paine and his henchman Spydah seek to destroy the Landmark City dam. Axel also tells Lioness about his past with Paine.

The Alpha Teens move out of Lee’s R & D physicality and into an abandoned Aquatic Center. Meanwhile, due to a freak accident caused by Axel previously, Paine gains new powers that emit terrible pain through his body which he can transfer to those he touch. With these powers, Spydah and added help from the acrobatic Cannonball Bros., Paine goes to Lee Industries, seeking revenge on Axel Manning.

Paine learns of Nutronium, a chemical that can put an end to his constant pain. He and Spydah seek to steal it with the help of Albert, a dangerous muscle-laden criminal who uses a barbell for a weapon. In the heat of battle with the Alpha Teens, Paine unintentionally mutates Albert into the super-strong giant, Flesh.

The Alpha Teens, Lee and the building security board head of Landmark City become trapped in the yet to be opened Lee Plaza. The culprit, Silas Greene the building’s deranged architect, seeks revenge against Lee using the building’s security robots and other lethal functions to dispose of him.

The Alpha Teens accompany Hawk, who stars in the movie being filmed, "Radioactive Island", to an island that served as a military testing site. While King’s animalistic nature steals Hawk’s thunder, it also gets the attention of Recombo, a mad scientist who combines different species of animals into one.