After Lee's Mecha Speeder and the crew of the cargo ship that held the vehicle go missing, the Alpha Teens are sent to investigate on Halloween night. What they find is a virtually lost portion of Landmark City filled with zombies. Their leader, Bonez soon make Hawk, Shark and Lioness part of their ranks.
Magness returns to Landmark City with her new biker boyfriend, D-Zel. She systematically causes problems for Landmark City, the Alpha Teens and her father, Paine. D-Zel experiences a change that makes him truly one with his bike.
After a meteorite temporary knocks out all power within Landmark City, Paine intends to steal it to make the city go through a much more permanent blackout. Also, Hawk poses as the leader of the Alpha Teens so he could impress reporter, Michelle Moreno.
The mystical sword of Jo-Lan is stolen from the Landmark City museum by a group of ninjas and the Alpha Teens go all the way to Hong Kong to recover it. Dragon returns with interest in the sword, mysterious intentions and unsure alliances.
As the Alpha Teens finally discover where Paine's base is located, Paine seeks to tunnel under Landmark City flood the city with lava. However, because of the intense heat of the lava, Paine forces Vinnie Rossi, now the monstrous concrete man, Mass to do the job, or else his mother will pay the price.