Zaw-Veenull, a Luodan ambassador, asks Ben to deliver their crown prince, Tiffin, to Jarrett in order to keep peace between the two species. Shortly after they begin their trek in space, the Omnitrix malfunctions and turns Ben into an Appoplexian named Rath who wants to fight anything that breaths. Rath keeps picking fights across the galaxy with anyone who crosses their path and things don't look good as they approach the Pantophage home world on a mission of peace.