After 28 years, his aunt Lotte's 80th birthday brings Daniel back to the place where he spent an eventful summer at the age of 18: her small hotel Haus am See on the beautiful Edersee, which is now run by her son Sascha and his wife Julia. The familiar surroundings inevitably take him back in time, conjuring up the first crushes, sexual experiments and genuine passion that Daniel experienced with and without his cousin in 1993. But the present also has many a surprise in store. An outing in the family, a restless teenager with big wishes for the future and a special kind of reunion make time fly by for everyone involved. When a guy from the past turns up unexpectedly, the chaos surrounding Daniel is perfect and the birthday party almost goes off the rails. But Aunt Lotte keeps on top of all the hustle and bustle. During the summer at her house by the lake.
