It turns out the Pieten have been eating too much candy and have no appetite during dinner. Chefpiet and Wegwijspiet decide to put the Pieten on a diet.
To help the Pieten lose weight a trainer known from television drops by. When the singing of the Pieten also turns out not to be at it's best Chefpiet tutors them.
Wegwijspiet holds a boring meeting which not only according to Chefpiet is completely unnecessary. Chefpiet leads the other Pieten and they sneak out of the meeting while Wegwijspiet is distracted.
It is the 5th of December and Chefpiet wakes Wegwijspiet with a breakfast in bed. Because the alarm clock is broken-down Wegwijspiet thinks he overslept.