Paul is stuck between Berthe's desire to move in and his obsession with trainers. Barbie plans to turn the city park into an oasis of electric charging points, while brother Ludwig turns the world formula into a trap song to save the world.

Paul, marathon runner against his will, can't run away this time when Berthe's new boyfriend Jan unasked chooses him as his best buddy. Meanwhile, Ludwig is making money with pneumo porn and Barbie is stirring up the SUV scene with Kenyan organic air.