Jimmy is framed for a bunch of crimes by a crooked police commissioner and is sent to Radica prison. Billy and Marian must free Jimmy before the Shadow Master can get rid of him using a deadly mutant named Hanniba

The Shadow Master knocks Billy and Jimmy into a hidden section of the Shadow Dojo called the Abyss and imprisons the Dragon Warriors in his Shadow Mural. Inside the Abyss, Billy and Jimmy meet their mother, Marika, who has been trapped there since the brothers were babies. Marika and her sons must escape from the Abyss so they can free the Dragon Warriors and stop the Shadow Master from controlling Metro City.