Charlotte (70) wants to spend a peaceful retirement. But suddenly, she has to provide shelter for her 17-year-old great-niece Lotta. The lively teenager becomes a test of patience. To keep up with the trendy girl clique, Lotta starts flirting with the English trainee teacher. Charlotte receives a visit from the teacher and is astonished to find out that 'the old Schubert' is none other than Irene, who once turned her head and heart upside down. Strangely enough, Irene hasn't lost any of her charm. Meanwhile, Lotta meets the neighbor's daughter Jill, who is way cooler than all the girls in the school clique combined. Jill confidently claims to be a lesbian. And not only that. Apparently, she also knows some sort of "lesbian trick." Whenever she touches Lotta briefly, it feels like a little electric shock. These new feelings are awakening.