Jackie is back in full force, battling evil and squashing demons in Season 4 of Jackie Chan Adventures. Daolon Wong summons the Shadowkhan to help him escape from prison. A new superhero team emerges known as the Amazing T-Troop. Paco tries on an Oni Mask that turns him into a demon, and Jackie must save him. The Enforcers join sides with Jackie and try to be good guys for a change. Finally, Jackie recovers the final Oni Mask, but something goes dreadfully wrong.