Mother Julia moves into her new boyfriend Taco's house together with her 2 daughters Mies and Kees and son Guus. Taco also has 2 daughters (Zimbini and Lotus) from his previous marriage with Moon, and a son (Max) from a relationship before his first marriage. 
That is a big change for everybody in this newly "put toghether" family. How do you handle different parenting styles, different norms and vallues, frustration, sadness over a divorce and the new bonus family members ?
And to make matters even worse for Julia, her ex husband Dennis who was absent most of the marriage because he chose his work over his family, now decides he has to be there for the kids, and buys the houseboat directly opposite the street from Taco's house.