Penn's emotions cause problems for the latest mission.

Penn, Sashi, and Boone must make the Princess Argelbleccht and Grinkon fall in love.

Penn, Sashi, and Boone must travel to the three most dangerous places in the multiverse in order to free Penn's parents as Rippen plans to conquer the Most Dangerous World Imaginable with Larry and those with him after having to close its portal from the other side.