Lia gets to grips with being old and falls in love with Mrs. Jensen. Jonas is going through puberty, which Thorsten is struggling with, and Titus is building an igloo. It's snowing at Kolinski's.

Peter's brother and his friends are chilling in Kolinski's parking lot, turning Peter into the little brother he is. Flora now feels more attracted to his big brother, which leads Peter to what he sees as the only right course of action: he will kill his brother. After an embarrassing visit to the kebab store, Thorsten wants to prove to himself that he is not an Alman.