When is a man a man? For Kai, the answer is clear: planted a tree, started a family, now he has to renovate his newly acquired home. Armed with the latest DIY tools, Kai and his buddies Pedro and Ulf tackle the charming old house. They are doweling, screwing and sanding for all they're worth. After all, the nest is supposed to be perfect. But to Kai's astonishment, it's not just his wife Ina who has something against the plans - the old building is also vehemently opposed to the renovation work...